Ford OBD1 Trouble Codes

The following trouble codes are specific to Ford.

Ford 2-digit OBD1 Trouble Codes

Abbreviations:
KOEO = Key On Engine Off
CM = Continues Memory
KOER = Key On Engine Running

Code(s)	KOEO	CM	KOER	Description
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.

Ford 3-digit OBD1 Trouble Codes

Abbreviations:
KOEO = Key On Engine Off
CM = Continues Memory
KOER = Key On Engine Running

Code(s)	KOEO	CM	KOER	Description
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