GM

93-95 4.6L VIN Y
12	Fuel control reference signal (4X) was not received by PCM for 4 seconds while cam sensor pulses were received.
13	Oxygen sensor voltage stays between 0.3 and 0.6 volts for 64 seconds. Engine was at normal operating temperature at a speed of over 800 RPM.
14	Coolant temperature sensor signal indicates a temperature of over 297° F.
15	Coolant temperature sensor signal indicates a temperature colder than -20° F.
16	Ignition voltage was either less than 10 volts or greater than 16 volts for 5 seconds.
17	Oxygen sensor voltage stays between 0.3 and 0.6 volts for 64 seconds. Engine was at normal operating temperature and over 800 RPM.
19	Fuel pump feedback voltage stayed above 7 volts for 6 seconds after ignition was turned on.
20	Fuel pump feedback voltage was 2 volts or less for 1.3 seconds.
21	TPS voltage was 4.96 volts or more.
22	TPS voltage was 0.1 volts or less when the engine was running at 600 RPM or more.
23	EST signal did not change when the ECM applied bypass voltage to the ignition module.
24	Vehicle speed was less than 5 MPH while transaxle turbine shaft speed was 3000 RPM or more and vehicle was in a forward gear.
25	Spark reference signal (24X) was not received by PCM for 4 seconds or longer while cam reference pulses were being received.
26	Throttle switch input to the PCM was closed for 2 seconds or longer while the TPS was 15.7 degrees or greater.
27	Throttle switch was open when vehicle was coasting down with brake applied. Throttle angle was 12 degrees or less but RPM was greater than desired.
28	Transaxle range switch input did not match actual gear selection.
29	Transaxle gear ratio does not match the gear ratio commanded by the PCM for 5 seconds.
30	TPS was 1.2% or more while ISC was retracting for 29 seconds, or TPS was 9.2% or less while ISC was extending for 29 seconds.
31	MAP sensor was greater than 5 volts.
32	MAP sensor was open showing a reading of 0.8 volts or less.
33	Wheel speed sensors indicated a rapid decrease in vehicle speed (indicating braking action) without a corresponding change in the extended travel brake switch for 1 second.
34	MAP sensor signal voltage was too high (low vacuum) for 15 seconds when throttle switch was closed.
35	PCM reference low signal voltage was less than 1.04 volts or greater than 3.98 volts for 1 second.
36	EGR pintle position varied more than 10% from desired position, or learned EGR closed position was less than 0.2 volts or greater than 2.0 volts.
37	Intake air temperature sensor showed a temperature of 297° F or more.
38	Intake air temperature sensor showed a temperature of 34° F or less.
39	TCC slip speed was 48 RPM or more for 45 seconds with transaxle in 3rd or 4th gear and TCC commanded ON.
40	Power steering switch was open for 60 seconds or more when vehicle was at a speed of 45 MPH or greater.
41	CAM reference pulses were not received when distributor reference pulses were received at an engine speed of 1600 RPM or less.
42	Left oxygen sensor was lean for more than 50 seconds when engine was warm and at 800 RPM or greater.
43	Left oxygen sensor was rich for more than 50 seconds when engine was warm and at 800 RPM or greater.
44	Right oxygen sensor was lean for more than 50 seconds when engine was warm and at 800 RPM or greater.
45	Right oxygen sensor was rich for more than 50 seconds when engine was warm and at 800 RPM or greater.
46	Front and rear fuel control block learn values differ by more than 15 counts for 10 minutes.
48	EGR open command was given during off idle operation.
51	PROM error.
52	PCM has lost primary battery power.
53	Distributor reference pulses were not received for 0.4 seconds when engine speed was greater than 568 RPM.
55	TPS zero point was out of range.
56	Turbine shaft speed was less than 50 RPM for 2 seconds with transaxle in gear and vehicle speed 10 MPH or greater.
57	Transmission fluid temperature was greater than 298° F for 5 seconds.
58	Pass Key fuel enable was not correct.
59	Transmission fluid temperature was less than -31° F.
60	Transmission was not in drive when cruise control was engaged.
61	Cruise vent solenoid commanded OFF but solenoid remained ON, or commanded ON but solenoid remained OFF.
62	Cruise vacuum solenoid commanded OFF but solenoid remained ON, or commanded ON but solenoid remained OFF.
63	Cruise control servo position was at least 39% with cruise engaged. Vehicle speed was 20 MPH higher than the set speed for 0.5 seconds.
64	Vehicle speed increased more than 16 MPH in 1 second while cruise control was engaged.
65	Cruise control servo position sensor was shorted, grounded, or open.
66	Engine RPM was 635 or more for 0.05 seconds with cruise control engaged.
67	Cruise control Set/Coast or Resume/Accel switch was closed for 10 minutes.
68	With cruise control engaged the throttle angle was greater than 20 degrees and servo position sensor indicated a stroke 19% or less than commanded for 2 seconds.
69	Traction control system was active with cruise control engaged.
70	Throttle position changed too rapidly without a corresponding change in MAP sensor signal when engine was running.
72	MAP sensor signal changed too rapidly while TPS signal was steady and engine speed did not change.
73	Coolant temperature sensor voltage has changed 0.3 volts in 1 second.
74	Intake air temperature sensor signal changed 0.3 volts or more in 0.25 seconds.
75	Vehicle speed changed by 4 MPH or more in 0.1 second while MAP sensor remained steady with engine running and brakes not applied.
76	Actual transaxle pressure differed from the commanded value by 0.16 amps or more for 1 second.
80	TPS "Idle Learn" was not complete after an EPROM reset.
83	Crankshaft position signal (24X) was not received while cam pulses were being received.
85	The "Idle Learn" throttle angle was more than 3.9 degrees.
86	Transmission input and output speed did not agree with the calculated ratio.
88	Torque converter clutch did not disengage when commanded OFF by PCM.
89	Transmission gear shift time was too long, 0.55 seconds or longer and adapt could not shorten the shift time for 1 second.
90	Vehicle speed was 36 MPH or more, brake was applied, but there was no TCC brake switch input for 5 consecutive times.
91	Vehicle was in gear with a speed of 7 MPH or more but Park/Neutral switch showed vehicle to be in Park/Neutral for 5 seconds.
93	Traction control system signals were not received by PCM.
94	Transmission gear selected did not match with the gear commanded for 2 seconds.
95	Engine stalled but ignition was not turned off.
96	Throttle angle was 65 degrees or more for 12 seconds with transmission in drive or reverse and vehicle speed was 5 MPH or less with brake being applied.
97	Gear selector was moved from park or neutral to drive or reverse with engine speed over 2000 RPM but under 6 MPH for 3 seconds.
99	Servo position sensor indicated that servo was still engaged after cruise control had been disengaged for 2 seconds. Throttle angle was above 20 degrees.
106	Sudden vehicle deceleration without brake switch being activated.
108	PROM error.
109	PCM has lost primary battery power.
110	Generator remained OFF after being commanded ON by PCM for 15 seconds.
112	EPROM error. Replace PCM PROM.
117	Shift "A" or "B" solenoid output was different than commanded for 10 consecutive times.
119	A fuel injector circuit was open or shorted for 0.5 seconds.
120	A/C low side temperature sensor showed a temperature less than -33° F or greater than 297° F.
121	A/C high side temperature sensor showed a temperature less than 23° F or greater than 419° F.
122	A/C coolant temperature sensor signal voltage indicated a temperature below 23° F or above 419° F with A/C on.
123	A/C refrigerant pressure was too low.
124	A/C compressor circuit was shorted (ON) but not requested ON by HVAC.
125	A/C high pressure switch was on (shorted) with A/C high side temperature greater than 203° F.
126	A/C high pressure switch disabled A/C compressor clutch 10 times when A/C high side temperature was less than 189° F.
128	A/C was disabled because of high refrigerant pressure. A/C high side temperature was higher than 189%F or as low as 169° F if code 128 was set 15 times in 30 seconds.
131	PCM did not receive a signal from the knock sensor. Spark advance was greater than necessary to cause a knock signal.
132	Knock sensor voltage was above 4.2 volts, or was 0 volts.
133	PCM indicated a loss of communication data from ABS for over 3 seconds.
134	PCM indicated a loss of communication data from IPC (instrument panel cluster) for over 5 seconds.
135	PCM indicated a loss of communication data from HVAC for 10 seconds.
136	PCM indicated a loss of communication data from DERM (diagnostic energy reserve module) for 20 seconds.
137	Loss of ABS Traction control data.