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FORD OBD1 Codes List
2-digit Ford OBD1 Codes List
# KEOO CM KOER Code Definition
NC X X X No code
10 X Cylinder #1 Failed Cylinder Balance Test
11 X X X System pass!
12 X Cannot control RPM during ER Self-Test high RPM check.
13 X Cannot control RPM during ER Self-Test low RPM check.
14 X
Two or more successive erratic Profile Ignition Pickup (PIP) pulses occurred, resulting in a
possible engine miss or stall.
15 X EEC permanent Read Only Memory (ROM) test failed.
15 X EEC battery powered Keep Alive Memory (KAM) test failed.
16 X IDM signal not received.
16 X RPM too low to perform HEGO test.
17 X RPM below Self-Test limit with Idle Air Control off
18 X SPOUT circuit open or spark angle word failure.
18 X IDM circuit failure or SPOUT circuit grounded
19 X Failure in EEC internal voltage.
19 X Cylinder Identification CID circuit failure.
19 X RPM erratic, dropped too low during test.
20 X Cylinder #2 Failed Cylinder Balance Test.
21 X X X ECT out of self test range 0.3 to 3.7 volts.
22 X X X MAP/BP sensor out of self test range
23 X X Closed throttle TPS voltage higher or lower than expected
24 X X X ACT sensor out of self test range 0.3 to 3.7 volts.
25 X Knock not sensed during dynamic test
26 X MAF sensor was greater than 0.7 volts with engine off
26 X MAF sensor was not between 0.2 and 1.5 volts with engine running.
26 X X TOT sensor out of self test range.
27 ?
28 X X VAT sensor out of self test range.
28 X Loss of IDM, right side.
29 X Insufficient input from vehicle speed sensor
30 X Cylinder #3 Failed Cylinder Balance Test.
31 X X PFE or EVP circuit below minimum voltage of 0.24 volts
31 X PFE or EVP circuit has intermittently failed below minimum voltage of 0.24 volts.
32 X X EVP circuit below minimum voltage of 0.24 volts.
32 X EVP circuit has intermittently failed below minimum voltage of 0.24 volts.
33 X X EGR valve opening not detected
34 X X PFE or EVP circuit above the closed limit of 0.67 volts
34 X PFE or EVP circuit has intermittently failed above the closed limit of 0.67 volts.
35 X X PFE or EVP circuit above the maximum limit of 4.81 volts.
35 X PFE or EVP circuit has intermittently failed above the maximum limit of 4.81 volts
39 X AXOD converter bypass clutch not applying properly
40 X Cylinder #4 Failed Cylinder Balance Test.
41 X HEGO sensor circuit indicates system lean (right side).
41 X No HEGO switching detected always lean (right side).
42 X HEGO sensor circuit indicates system rich (right side).
42 X No HEGO switching detected always rich (right side).
43 X HEGO lean at Full Throttle.
44 X X Thermactor Air Injection system inoperative (Right side).
45 X DIS coil pack 3 circuit failure or coil 1 primary circuit failure.
45 X Thermactor secondary air is misdirected
46 X DIS coil pack 1 circuit failure or coil 2 primary circuit failure.
46 X Thermactor air not bypassed during self test.
47 X 4WD switch closed.
47 X Measured air flow too low at base idle
48 X Loss of IDM, left side.
48 X Measured air flow too high at base idle
49 X SPOUT signal default to 10 BTDC.
49 X 1 - 2 shift error (E4OD).
50 X Cylinder #5 Failed Cylinder Balance Test.
51 X X ECT sensor signal is greater than the Self-Test maximum of 4.6 volts.
52 X X X Power steering pressure switch always open or closed.
53 X TPS circuit above maximum 4.5 volts.
53 X TPS circuit has intermittently failed above maximum 4.5 volts.
54 X X ACT sensor signal is greater than the Self-Test maximum of 4.6 volts.
55 X Keyed power input to processor is open.
56 X X MAF circuit above maximum voltage of 4.5volts.
56 X X TOT sensor output is greater than Self-Test maximum value of 4.8 volts.
57 X Octane adjust service pin in use / circuit grounded.
57 X AXOD Neutral pressure switch circuit failed open.
58 X X VAT indicated -40F / circuit open.
59 X X Low speed fuel pump circuit failure.
59 X X 2 - 3 shift error (E4OD).
60 X Cylinder #6 Failed Cylinder Balance Test.
61 X ECT sensor is less than the Self-Test minimum of 0.2 volts
61 X ECT sensor has intermittently failed below 0.2 volts
62 X 4/3 or 3/2 pressure switch circuit failed open
62 X Converter clutch error (E4OD).
63 X TPS circuit below minimum 0.6 volts
63 X TPS circuit has intermittently failed below minimum 0.6 volts.
64 X ACT sensor is less than the Self-Test minimum of 0.2 volts.
64 X ACT sensor has intermittently failed below 0.2 volts.
65 X Overdrive OFF switch was not cycled during KOER test (user error).
66 X MAF sensor went below 0.4 volts during the last 80 warm-up cycles.
66 X X TOT sensor output was less than Self-Test minimum value of 0.15 volts.
67 X X Neutral safety circuit failure
67 X A/C circuit was on during KOER Self-Test
68 X Transmission recently overheated, or TOT sensor intermittently failed below 0.2 volts.
69 X 3 - 4 shift error.
70 X Cylinder #7 Failed Cylinder Balance Test.
71 X Software re-initialization detected or Cluster ControlAssembly circuit failed
72 X Power interruption detected or Message Center Control Assembly circuit failed.
72 X Insufficient MAF/MAP change during Dynamic Response Test (user error).
73 X TPS senor did not exceed 25% rotation during Dynamic Response Test (user error)
74 X Brake On/Off switch not actuated during KOER test (user error).
75 X Brake On/Off switch failure always ON.
76 X Insufficient VAT change during Dynamic Response Test (user error)
77 X System failed to recognize brief WOT during Dynamic Response Test (user error)
79 X A/C or defrost on during self test.
80 X Cylinder #8 Failed Cylinder Balance Test
81 X Air management 2 circuit failure (AM2/TAD).
81 X MAP sensor vacuum was not greater than 2 in-Hg (7 kPa) during normal vehicle operation
82 X Air management 1 circuit failure (AM1/TAB) .
83 X EGR Control solenoid circuit failure.
83 X High speed electro-drive fan circuit failure.
83 X X Low speed fuel pump relay circuit open
84 X X EGR Vacuum Solenoid circuit failure.
85 X X Canister Purge Solenoid circuit failure.
86 X 3  4 Shift solenoid circuit failure.
86 X Adaptive fuel limit reached.
87 X
Fuel pump primary circuit failure. When the FP relay was activated by the EEC, voltage was not
detected on the control circuit.
87 X Voltage was not detected on Fuel Pump Monitor while the engine was running.
88 X Electro-drive fan circuit failure.
88 X Loss of dual plug input control
89 X Converter clutch solenoid circuit failure.
90 X All cylinders passed Cylinder Balance Test.
91 X Shift solenoid 1 circuit failure (E4OD).
91 X No HEGO switching detected always lean (left side).
91 X HEGO sensor circuit indicates system lean (left side).
92 X Shift solenoid 2 circuit failure (E4OD).
92 X No HEGO switching detected always rich (left side).
92 X HEGO sensor circuit indicates system rich (left side).
93 X Coast clutch solenoid circuit failure (E4OD).
94 X Converter clutch solenoid circuit failure (E4OD).
94 X Thermactor Air Injection system inoperative (left side).
95 X X
Fuel pump secondary circuit failure. The EEC senses infinite resistance to ground from the fuel
pump on the Fuel Pump Monitor circuit.
96 X X
Fuel pump secondary circuit failure. The EEC did not sense battery voltage on the Fuel Pump
Monitor circuit.
97 X Overdrive cancel indicator light circuit failure (E4OD)
98 X X Electronic pressure control driver open in EEC (E4OD).
98 X Hard fault present
99 X X Electronic pressure control circuit failure (E4OD).
99 X EEC system hasnt learned to control idle.
3-digit Ford OBD1 Codes List
# KOEO CM KOER 3-Digit Code Definitions
NC X X X No Codes
111 X X X System pass
112 X
ACT sensor signal is less than the Self-Test minimum of
0.2 volts
112 X
ACT circuit has intermittently failed below minimum 0.2
volts.
113 X
ACT sensor signal is greater than the Self-Test
maximum of 4.6 volts.
113 X
ACT circuit has intermittently failed above the
maximum of 4.6 volts
114 X X ACT out of self test range 0.3 to 3.7 volts.
116 X X ECT out of self test range 0.3 to 3.7 volts.
117 X
ECT sensor signal is less than the Self-Test minimum of
0.2 volts.
117 X
ECT circuit has intermittently failed below minimum 0.2
volts.
118 X
ECT sensor signal is greater than the Self-Test maximum
of 4.6 volts.
118 X
ECT circuit has intermittently failed above the maximum
of 4.6 volts
121 X X
Closed throttle TPS voltage higher or lower than
expected.
121 X
TP sensor was inconsistent with the MAF/MAP value in
the last 80 drive cycles.
122 X TPS circuit below minimum 0.6 volts.
122 X
TPS circuit has intermittently failed below minimum 0.6
volts.
123 X TP circuit above maximum 4.5 volts.
123 X
TPS circuit has intermittently failed above maximum 4.5
volts.
124 X
TP sensor was higher than expected with the MAF/MAP
value in the last 80 drive cycles.
125 X
TP sensor was lower than expected with the MAF/MAP
value in the last 80 drive cycles
126 X X X MAP/BP sensor out of self test range 1.4 to 1.6 volts.
128 X
MAP sensor vacuum was not greater than 2 in-Hg (7
kPa) during normal vehicle operation.
129 X
Insufficient MAF/MAP change during Dynamic
Response Test.
136 X HEGO sensor circuit indicates system lean (left side)
137 X HEGO sensor circuit indicates system rich (left side)
139 X No HEGO sensor switching detected or disconnected (left side)
141 X HEGO sensor circuit indicates system lean (both sides)
144 X
No HEGO sensor switching detected or disconnected
(right side)
157 X
MAF sensor went below 0.4 volts during the last 80
warm-up cycles.
158 X X
MAF sensor went above 4.5 volts during the last 80
warm-up cycles.
159 X MAF signal was greater than 0.70 volt during KOEO.
159 X
MAF signal was not between 0.20 and 1.50 volts during
KOER.
167 X
TPS did not exceed 25% rotation during the Dynamic
Response Test.
171 X
Fuel system at adaptive limit, HEGO unable to switch
(right side)
172 X HEGO sensor circuit indicates system lean (right side)
173 X HEGO sensor circuit indicates system rich (right side)
174 X HEGO switching time is slow
175 X
Fuel system at adaptive limit, HEGO unable to switch
(left side)
176 X HEGO sensor circuit indicates system lean (left side)
177 X HEGO sensor circuit indicates system rich (left side)
178 X HEGO switching time is slow
179 X
Right side still rich, at leanest adaptive limit, during part
throttle.
181 X
Right side still lean, at richest adaptive limit, during part
throttle.
182 X Right side still rich, at leanest adaptive limit, at idle.
183 X Right side still lean, at richest adaptive limit, at idle.
184 X MAF higher than expected
185 X MAF lower than expected
186 X Injector pulse width longer than expected
187 X Injector pulse width shorter than expected
188 X
Left side still rich, at leanest adaptive limit, during part
throttle.
189 X
Left side still lean, at richest adaptive limit, during part
throttle
191 X Left side still rich, at leanest adaptive limit, at idle.
192 X Left side still lean, at richest adaptive limit, at idle.
193 X Flexible Fuel sensor circuit failure
194 X Run cylinder balance diagnostic test.
195 X Run cylinder balance diagnostic test.
211 X
Two or more successive erratic Profile Ignition Pickup
(PIP) pulses occurred, resulting in a possible engine miss
or stall.
212 X Loss of IDM input to EEC or SPOUT circuit grounded.
213 X SPOUT circuit open
214 X Cylinder Identification (CID) circuit failure
215 X EEC detected coil 1 primary circuit failure
216 X EEC detected coil 2 primary circuit failure
217 X EEC detected coil 3 primary circuit failure
218 X Loss of IDM signal (left side)
219 X
SPOUT failure, spark timing has defaulted to 10 degrees
BTDC.
222 X Loss of IDM signal (right side)
223 X Loss of Dual Plug Inhibit control
224 X Erratic IDM input to processor
225 X
Knock Sensor (KS) signal not sensed during dynamic
response test.
226 X IDM signal not received
244 X Camshaft Position (CMP) Sensor failure.
311 X Thermactor air system inoperative (right side)
312 X Thermactor air misdirected upstream during self test
313 X
Thermactor air not bypassed during self test.
314 X Thermactor air system inoperative (left side)
326 X X
PFE or DPFE circuit voltage lower than expected with
zero EVR duty cycle
327 X X X
DPFE or EVP circuit below minimum voltage of 0.2
volts.
328 X X X EVP circuit below minimum voltage of 0.24 volts.
332 X X EGR valve opening not detected.
334 X X X
DPFE or EVP circuit above the closed limit of 0.67
volts.
335 X PFE or DPFE sensor voltage out of Self-Test range.
336 X X
EVP or DPFE circuit voltage above maximum voltage
with zero EVR duty cycle.
337 X X X
DPFE or EVP circuit above the maximum limit of 4.81
volts.
338 X ECT lower than expected.
339 X ECT higher than expected.
341 X
Octane Adjust shorting bar is not in or the OCT ADJ
circuit is open.
381 X
Frequent A/C compressor clutch (ACCS) cycling less
than 8.5 seconds.
411 X Cannot control rpm during KOER low RPM check
412 X Cannot control rpm during KOER high RPM check
452 X
Computer detected an error in the VSS or PSOM signal
during the last 80 warm-up cycles
461 X Engine over speed was detected
511 X X X EEC permanent Read Only Memory (ROM) test failed.
512 X
EEC battery powered Keep Alive Memory (KAM) test
failed
513 X Failure in EEC processor internal voltage.
519 X Power steering pressure switch circuit open.
521 X
Power steering pressure switch did not change state
during KOER test
522 X Vehicle not in PARK or NEUTRAL during KOEO
524 X X
When the PCM commanded the fuel pump on, voltage
was not detected on FPM.
525 X X Vehicle in gear or A/C on during Self-Test
526 X Neutral Pressure Switch closed or A/C on
527 X Neutral Drive Switch open or A/C on
528 X Clutch Switch Circuit failure
529 X
Data Communications Link or Electronic Instrument
Cluster circuit failure.
532 X
Data Communications Link or Electronic Instrument
Cluster circuit failure.
533 X
Data Communications Link or Electronic Instrument
Cluster circuit failure.
536 X X
Brake On/Off circuit failure / switch not actuated during
KOER test
538 X
Insufficient RPM change during KOER dynamic
response test/ Operator error
539 X A/C or Defroster ON during KOEO test
542 X X Fuel pump circuit failure
543 X X
When the PCM commanded the fuel pump on, voltage
was not detected on FPM.
551 X Intake Manifold Runner Control (IMRC) circuit failure
552 X Air management 1 circuit failure (AM1/TAB)
553 X Air management 2 circuit failure (AM1/TAD)
554 X
Fuel Pressure Regulator Control (FPRC) solenoid circuit
failure
556 X X Fuel Pump circuit failure
557 X X Fuel pump relay coil resistance failure
558 X EGR Vacuum Regulator circuit failure
559 X Air Conditioning On relay circuit failure
563 X High Speed Electro-Drive Fan circuit failure
564 X Electro-Drive Fan circuit failure
565 X Canister purge circuit failure
566 X 3  4 Shift Solenoid failure
569 X Canister purge 2 circuit failure
571 X EGR Atmospheric Regulator circuit failure.
572 X EGR Vacuum Regulator circuit failure.
578 X
A/C Pressure (ACP) sensor VREF circuit is short to
ground.
579 X
A/C Pressure (ACP) sensor circuit is above maximum
voltage.
581 X
When the cooling fan was activated, the circuit exceeded
current draw.
582 X
Open or short to power in the power-to-cooling fan
circuit.
583 X
When the fuel pump was activated, the power-to-pump
circuit exceeded the normal current draw
584 X Variable Control Relay Module circuit grounded.
585 X A/C clutch circuit exceeded the normal current draw
586 X A/C clutch circuit open or shorted to power
587 X X Data Communications Link (DCL) error
593 X X Oxygen Sensor Heater circuit failure
617 X 1 - 2 shift error (E4OD)
618 X 2 - 3 shift error (E4OD)
619 X 3 - 4 shift error (E4OD)
621 X Shift solenoid #1 circuit failure
622 X Shift solenoid #2 circuit failure
623 X
Overdrive light circuit failure
624 X X
Electronic Pressure Control solenoid or driver circuit
failure
625 X X Electronic Pressure Control driver open in EEC
626 X Coast clutch solenoid circuit failure (E4OD)
627 X Converter clutch solenoid circuit failure (E4OD)
628 X Converter clutch Lock-Up error (E4OD)
629 X X Converter clutch control circuit failure
631 X Overdrive light circuit failure
632 X Overdrive cancel switch not changing state (E4OD)
633 X 4WD switch is closed
634 X X
Transmission Manual Lever Position Sensor circuit out
of self test.
636 X X TOT sensor voltage out of self test range.
637 X X TOT sensor circuit above maximum voltage
638 X X TOT sensor circuit below minimum voltage
639 X X Insufficient input from the Transmission Speed Sensor
641 X Shift solenoid #3 circuit failure
643 X X Converter Clutch Control circuit failure
645 X Incorrect gear ratio obtained for first gear
646 X Incorrect gear ratio obtained for second gear
647 X Incorrect gear ratio obtained for third gear
648 X Incorrect gear ratio obtained for fourth gear
649 X Electronic Pressure Control range failure
651 X Electronic Pressure Control circuit failure
652 X Modulated Converter Clutch Control solenoid output circuit error
653 X
Transmission Control Switch was not cycled during
KOER Self-Test.
654 X MLP sensor not in park position
656 X Converter Clutch Control continuous slip error detected
657 X Transmission over temperature condition occurred.
659 X
High vehicle speed detected while the vehicle was in
PARK.
667 X
Transmission Manual Lever Position Sensor circuit
shorted
668 X Transmission Manual Lever Position Sensor circuit open
675 X MLP circuit voltage was out of the expected range
691 X 4WD switch circuit failure.
998 Hard fault present
NC X X X No Codes

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Ford OBD1 Code List (PDF)

  • 1. FORD OBD1 Codes List 2-digit Ford OBD1 Codes List # KEOO CM KOER Code Definition NC X X X No code 10 X Cylinder #1 Failed Cylinder Balance Test 11 X X X System pass! 12 X Cannot control RPM during ER Self-Test high RPM check. 13 X Cannot control RPM during ER Self-Test low RPM check. 14 X Two or more successive erratic Profile Ignition Pickup (PIP) pulses occurred, resulting in a possible engine miss or stall. 15 X EEC permanent Read Only Memory (ROM) test failed. 15 X EEC battery powered Keep Alive Memory (KAM) test failed. 16 X IDM signal not received. 16 X RPM too low to perform HEGO test. 17 X RPM below Self-Test limit with Idle Air Control off 18 X SPOUT circuit open or spark angle word failure. 18 X IDM circuit failure or SPOUT circuit grounded 19 X Failure in EEC internal voltage. 19 X Cylinder Identification CID circuit failure. 19 X RPM erratic, dropped too low during test. 20 X Cylinder #2 Failed Cylinder Balance Test. 21 X X X ECT out of self test range 0.3 to 3.7 volts. 22 X X X MAP/BP sensor out of self test range 23 X X Closed throttle TPS voltage higher or lower than expected 24 X X X ACT sensor out of self test range 0.3 to 3.7 volts. 25 X Knock not sensed during dynamic test 26 X MAF sensor was greater than 0.7 volts with engine off 26 X MAF sensor was not between 0.2 and 1.5 volts with engine running. 26 X X TOT sensor out of self test range. 27 ? 28 X X VAT sensor out of self test range. 28 X Loss of IDM, right side. 29 X Insufficient input from vehicle speed sensor
  • 2. 30 X Cylinder #3 Failed Cylinder Balance Test. 31 X X PFE or EVP circuit below minimum voltage of 0.24 volts 31 X PFE or EVP circuit has intermittently failed below minimum voltage of 0.24 volts. 32 X X EVP circuit below minimum voltage of 0.24 volts. 32 X EVP circuit has intermittently failed below minimum voltage of 0.24 volts. 33 X X EGR valve opening not detected 34 X X PFE or EVP circuit above the closed limit of 0.67 volts 34 X PFE or EVP circuit has intermittently failed above the closed limit of 0.67 volts. 35 X X PFE or EVP circuit above the maximum limit of 4.81 volts. 35 X PFE or EVP circuit has intermittently failed above the maximum limit of 4.81 volts 39 X AXOD converter bypass clutch not applying properly 40 X Cylinder #4 Failed Cylinder Balance Test. 41 X HEGO sensor circuit indicates system lean (right side). 41 X No HEGO switching detected always lean (right side). 42 X HEGO sensor circuit indicates system rich (right side). 42 X No HEGO switching detected always rich (right side). 43 X HEGO lean at Full Throttle. 44 X X Thermactor Air Injection system inoperative (Right side). 45 X DIS coil pack 3 circuit failure or coil 1 primary circuit failure. 45 X Thermactor secondary air is misdirected 46 X DIS coil pack 1 circuit failure or coil 2 primary circuit failure. 46 X Thermactor air not bypassed during self test. 47 X 4WD switch closed. 47 X Measured air flow too low at base idle 48 X Loss of IDM, left side. 48 X Measured air flow too high at base idle 49 X SPOUT signal default to 10 BTDC. 49 X 1 - 2 shift error (E4OD). 50 X Cylinder #5 Failed Cylinder Balance Test. 51 X X ECT sensor signal is greater than the Self-Test maximum of 4.6 volts. 52 X X X Power steering pressure switch always open or closed. 53 X TPS circuit above maximum 4.5 volts. 53 X TPS circuit has intermittently failed above maximum 4.5 volts. 54 X X ACT sensor signal is greater than the Self-Test maximum of 4.6 volts.
  • 3. 55 X Keyed power input to processor is open. 56 X X MAF circuit above maximum voltage of 4.5volts. 56 X X TOT sensor output is greater than Self-Test maximum value of 4.8 volts. 57 X Octane adjust service pin in use / circuit grounded. 57 X AXOD Neutral pressure switch circuit failed open. 58 X X VAT indicated -40F / circuit open. 59 X X Low speed fuel pump circuit failure. 59 X X 2 - 3 shift error (E4OD). 60 X Cylinder #6 Failed Cylinder Balance Test. 61 X ECT sensor is less than the Self-Test minimum of 0.2 volts 61 X ECT sensor has intermittently failed below 0.2 volts 62 X 4/3 or 3/2 pressure switch circuit failed open 62 X Converter clutch error (E4OD). 63 X TPS circuit below minimum 0.6 volts 63 X TPS circuit has intermittently failed below minimum 0.6 volts. 64 X ACT sensor is less than the Self-Test minimum of 0.2 volts. 64 X ACT sensor has intermittently failed below 0.2 volts. 65 X Overdrive OFF switch was not cycled during KOER test (user error). 66 X MAF sensor went below 0.4 volts during the last 80 warm-up cycles. 66 X X TOT sensor output was less than Self-Test minimum value of 0.15 volts. 67 X X Neutral safety circuit failure 67 X A/C circuit was on during KOER Self-Test 68 X Transmission recently overheated, or TOT sensor intermittently failed below 0.2 volts. 69 X 3 - 4 shift error. 70 X Cylinder #7 Failed Cylinder Balance Test. 71 X Software re-initialization detected or Cluster ControlAssembly circuit failed 72 X Power interruption detected or Message Center Control Assembly circuit failed. 72 X Insufficient MAF/MAP change during Dynamic Response Test (user error). 73 X TPS senor did not exceed 25% rotation during Dynamic Response Test (user error) 74 X Brake On/Off switch not actuated during KOER test (user error). 75 X Brake On/Off switch failure always ON. 76 X Insufficient VAT change during Dynamic Response Test (user error) 77 X System failed to recognize brief WOT during Dynamic Response Test (user error) 79 X A/C or defrost on during self test.
  • 4. 80 X Cylinder #8 Failed Cylinder Balance Test 81 X Air management 2 circuit failure (AM2/TAD). 81 X MAP sensor vacuum was not greater than 2 in-Hg (7 kPa) during normal vehicle operation 82 X Air management 1 circuit failure (AM1/TAB) . 83 X EGR Control solenoid circuit failure. 83 X High speed electro-drive fan circuit failure. 83 X X Low speed fuel pump relay circuit open 84 X X EGR Vacuum Solenoid circuit failure. 85 X X Canister Purge Solenoid circuit failure. 86 X 3 4 Shift solenoid circuit failure. 86 X Adaptive fuel limit reached. 87 X Fuel pump primary circuit failure. When the FP relay was activated by the EEC, voltage was not detected on the control circuit. 87 X Voltage was not detected on Fuel Pump Monitor while the engine was running. 88 X Electro-drive fan circuit failure. 88 X Loss of dual plug input control 89 X Converter clutch solenoid circuit failure. 90 X All cylinders passed Cylinder Balance Test. 91 X Shift solenoid 1 circuit failure (E4OD). 91 X No HEGO switching detected always lean (left side). 91 X HEGO sensor circuit indicates system lean (left side). 92 X Shift solenoid 2 circuit failure (E4OD). 92 X No HEGO switching detected always rich (left side). 92 X HEGO sensor circuit indicates system rich (left side). 93 X Coast clutch solenoid circuit failure (E4OD). 94 X Converter clutch solenoid circuit failure (E4OD). 94 X Thermactor Air Injection system inoperative (left side). 95 X X Fuel pump secondary circuit failure. The EEC senses infinite resistance to ground from the fuel pump on the Fuel Pump Monitor circuit. 96 X X Fuel pump secondary circuit failure. The EEC did not sense battery voltage on the Fuel Pump Monitor circuit. 97 X Overdrive cancel indicator light circuit failure (E4OD) 98 X X Electronic pressure control driver open in EEC (E4OD). 98 X Hard fault present 99 X X Electronic pressure control circuit failure (E4OD).
  • 5. 99 X EEC system hasnt learned to control idle. 3-digit Ford OBD1 Codes List # KOEO CM KOER 3-Digit Code Definitions NC X X X No Codes 111 X X X System pass 112 X ACT sensor signal is less than the Self-Test minimum of 0.2 volts 112 X ACT circuit has intermittently failed below minimum 0.2 volts. 113 X ACT sensor signal is greater than the Self-Test maximum of 4.6 volts. 113 X ACT circuit has intermittently failed above the maximum of 4.6 volts 114 X X ACT out of self test range 0.3 to 3.7 volts. 116 X X ECT out of self test range 0.3 to 3.7 volts. 117 X ECT sensor signal is less than the Self-Test minimum of 0.2 volts. 117 X ECT circuit has intermittently failed below minimum 0.2 volts. 118 X ECT sensor signal is greater than the Self-Test maximum of 4.6 volts. 118 X ECT circuit has intermittently failed above the maximum of 4.6 volts 121 X X Closed throttle TPS voltage higher or lower than expected. 121 X TP sensor was inconsistent with the MAF/MAP value in the last 80 drive cycles. 122 X TPS circuit below minimum 0.6 volts. 122 X TPS circuit has intermittently failed below minimum 0.6 volts. 123 X TP circuit above maximum 4.5 volts. 123 X TPS circuit has intermittently failed above maximum 4.5 volts. 124 X TP sensor was higher than expected with the MAF/MAP value in the last 80 drive cycles.
  • 6. 125 X TP sensor was lower than expected with the MAF/MAP value in the last 80 drive cycles 126 X X X MAP/BP sensor out of self test range 1.4 to 1.6 volts. 128 X MAP sensor vacuum was not greater than 2 in-Hg (7 kPa) during normal vehicle operation. 129 X Insufficient MAF/MAP change during Dynamic Response Test. 136 X HEGO sensor circuit indicates system lean (left side) 137 X HEGO sensor circuit indicates system rich (left side) 139 X No HEGO sensor switching detected or disconnected (left side) 141 X HEGO sensor circuit indicates system lean (both sides) 144 X No HEGO sensor switching detected or disconnected (right side) 157 X MAF sensor went below 0.4 volts during the last 80 warm-up cycles. 158 X X MAF sensor went above 4.5 volts during the last 80 warm-up cycles. 159 X MAF signal was greater than 0.70 volt during KOEO. 159 X MAF signal was not between 0.20 and 1.50 volts during KOER. 167 X TPS did not exceed 25% rotation during the Dynamic Response Test. 171 X Fuel system at adaptive limit, HEGO unable to switch (right side) 172 X HEGO sensor circuit indicates system lean (right side) 173 X HEGO sensor circuit indicates system rich (right side) 174 X HEGO switching time is slow 175 X Fuel system at adaptive limit, HEGO unable to switch (left side) 176 X HEGO sensor circuit indicates system lean (left side) 177 X HEGO sensor circuit indicates system rich (left side) 178 X HEGO switching time is slow 179 X Right side still rich, at leanest adaptive limit, during part throttle. 181 X Right side still lean, at richest adaptive limit, during part throttle. 182 X Right side still rich, at leanest adaptive limit, at idle.
  • 7. 183 X Right side still lean, at richest adaptive limit, at idle. 184 X MAF higher than expected 185 X MAF lower than expected 186 X Injector pulse width longer than expected 187 X Injector pulse width shorter than expected 188 X Left side still rich, at leanest adaptive limit, during part throttle. 189 X Left side still lean, at richest adaptive limit, during part throttle 191 X Left side still rich, at leanest adaptive limit, at idle. 192 X Left side still lean, at richest adaptive limit, at idle. 193 X Flexible Fuel sensor circuit failure 194 X Run cylinder balance diagnostic test. 195 X Run cylinder balance diagnostic test. 211 X Two or more successive erratic Profile Ignition Pickup (PIP) pulses occurred, resulting in a possible engine miss or stall. 212 X Loss of IDM input to EEC or SPOUT circuit grounded. 213 X SPOUT circuit open 214 X Cylinder Identification (CID) circuit failure 215 X EEC detected coil 1 primary circuit failure 216 X EEC detected coil 2 primary circuit failure 217 X EEC detected coil 3 primary circuit failure 218 X Loss of IDM signal (left side) 219 X SPOUT failure, spark timing has defaulted to 10 degrees BTDC. 222 X Loss of IDM signal (right side) 223 X Loss of Dual Plug Inhibit control 224 X Erratic IDM input to processor 225 X Knock Sensor (KS) signal not sensed during dynamic response test. 226 X IDM signal not received 244 X Camshaft Position (CMP) Sensor failure. 311 X Thermactor air system inoperative (right side) 312 X Thermactor air misdirected upstream during self test
  • 8. 313 X Thermactor air not bypassed during self test. 314 X Thermactor air system inoperative (left side) 326 X X PFE or DPFE circuit voltage lower than expected with zero EVR duty cycle 327 X X X DPFE or EVP circuit below minimum voltage of 0.2 volts. 328 X X X EVP circuit below minimum voltage of 0.24 volts. 332 X X EGR valve opening not detected. 334 X X X DPFE or EVP circuit above the closed limit of 0.67 volts. 335 X PFE or DPFE sensor voltage out of Self-Test range. 336 X X EVP or DPFE circuit voltage above maximum voltage with zero EVR duty cycle. 337 X X X DPFE or EVP circuit above the maximum limit of 4.81 volts. 338 X ECT lower than expected. 339 X ECT higher than expected. 341 X Octane Adjust shorting bar is not in or the OCT ADJ circuit is open. 381 X Frequent A/C compressor clutch (ACCS) cycling less than 8.5 seconds. 411 X Cannot control rpm during KOER low RPM check 412 X Cannot control rpm during KOER high RPM check 452 X Computer detected an error in the VSS or PSOM signal during the last 80 warm-up cycles 461 X Engine over speed was detected 511 X X X EEC permanent Read Only Memory (ROM) test failed. 512 X EEC battery powered Keep Alive Memory (KAM) test failed 513 X Failure in EEC processor internal voltage. 519 X Power steering pressure switch circuit open. 521 X Power steering pressure switch did not change state during KOER test 522 X Vehicle not in PARK or NEUTRAL during KOEO
  • 9. 524 X X When the PCM commanded the fuel pump on, voltage was not detected on FPM. 525 X X Vehicle in gear or A/C on during Self-Test 526 X Neutral Pressure Switch closed or A/C on 527 X Neutral Drive Switch open or A/C on 528 X Clutch Switch Circuit failure 529 X Data Communications Link or Electronic Instrument Cluster circuit failure. 532 X Data Communications Link or Electronic Instrument Cluster circuit failure. 533 X Data Communications Link or Electronic Instrument Cluster circuit failure. 536 X X Brake On/Off circuit failure / switch not actuated during KOER test 538 X Insufficient RPM change during KOER dynamic response test/ Operator error 539 X A/C or Defroster ON during KOEO test 542 X X Fuel pump circuit failure 543 X X When the PCM commanded the fuel pump on, voltage was not detected on FPM. 551 X Intake Manifold Runner Control (IMRC) circuit failure 552 X Air management 1 circuit failure (AM1/TAB) 553 X Air management 2 circuit failure (AM1/TAD) 554 X Fuel Pressure Regulator Control (FPRC) solenoid circuit failure 556 X X Fuel Pump circuit failure 557 X X Fuel pump relay coil resistance failure 558 X EGR Vacuum Regulator circuit failure 559 X Air Conditioning On relay circuit failure 563 X High Speed Electro-Drive Fan circuit failure 564 X Electro-Drive Fan circuit failure 565 X Canister purge circuit failure 566 X 3 4 Shift Solenoid failure 569 X Canister purge 2 circuit failure 571 X EGR Atmospheric Regulator circuit failure. 572 X EGR Vacuum Regulator circuit failure.
  • 10. 578 X A/C Pressure (ACP) sensor VREF circuit is short to ground. 579 X A/C Pressure (ACP) sensor circuit is above maximum voltage. 581 X When the cooling fan was activated, the circuit exceeded current draw. 582 X Open or short to power in the power-to-cooling fan circuit. 583 X When the fuel pump was activated, the power-to-pump circuit exceeded the normal current draw 584 X Variable Control Relay Module circuit grounded. 585 X A/C clutch circuit exceeded the normal current draw 586 X A/C clutch circuit open or shorted to power 587 X X Data Communications Link (DCL) error 593 X X Oxygen Sensor Heater circuit failure 617 X 1 - 2 shift error (E4OD) 618 X 2 - 3 shift error (E4OD) 619 X 3 - 4 shift error (E4OD) 621 X Shift solenoid #1 circuit failure 622 X Shift solenoid #2 circuit failure 623 X Overdrive light circuit failure 624 X X Electronic Pressure Control solenoid or driver circuit failure 625 X X Electronic Pressure Control driver open in EEC 626 X Coast clutch solenoid circuit failure (E4OD) 627 X Converter clutch solenoid circuit failure (E4OD) 628 X Converter clutch Lock-Up error (E4OD) 629 X X Converter clutch control circuit failure 631 X Overdrive light circuit failure 632 X Overdrive cancel switch not changing state (E4OD) 633 X 4WD switch is closed 634 X X Transmission Manual Lever Position Sensor circuit out of self test. 636 X X TOT sensor voltage out of self test range.
  • 11. 637 X X TOT sensor circuit above maximum voltage 638 X X TOT sensor circuit below minimum voltage 639 X X Insufficient input from the Transmission Speed Sensor 641 X Shift solenoid #3 circuit failure 643 X X Converter Clutch Control circuit failure 645 X Incorrect gear ratio obtained for first gear 646 X Incorrect gear ratio obtained for second gear 647 X Incorrect gear ratio obtained for third gear 648 X Incorrect gear ratio obtained for fourth gear 649 X Electronic Pressure Control range failure 651 X Electronic Pressure Control circuit failure 652 X Modulated Converter Clutch Control solenoid output circuit error 653 X Transmission Control Switch was not cycled during KOER Self-Test. 654 X MLP sensor not in park position 656 X Converter Clutch Control continuous slip error detected 657 X Transmission over temperature condition occurred. 659 X High vehicle speed detected while the vehicle was in PARK. 667 X Transmission Manual Lever Position Sensor circuit shorted 668 X Transmission Manual Lever Position Sensor circuit open 675 X MLP circuit voltage was out of the expected range 691 X 4WD switch circuit failure. 998 Hard fault present NC X X X No Codes