GM OBD/OBD2 Codes >> GM 90 4.5L VIN 3

GM

90 4.5L VIN 3
12PCM did not receive distributor reference pulses for 4 seconds while cam pulses were being received.
13Right oxygen sensor voltage stays between 0.307 and 0.609 volts for 64 seconds.
14Coolant temperature sensor signal indicates a temperature of over 311° F.
15Coolant temperature sensor signal indicates a temperature colder than -27° F.
16Ignition voltage was either less than 10 volts or greater than 16 volts for 5 seconds.
17Left oxygen sensor voltage stays between 0.307 and 0.609 volts for 64 seconds. Engine was at normal operating temperature at a speed over 800 RPM.
19Fuel pump feedback voltage stayed above 7 volts for 4 seconds after ignition was turned on.
20Fuel pump feedback voltage was 2 volts or less for 1 second.
21TPS value was 72 degrees or more for 0.7 seconds.
22TPS value was 1.3 degrees or less for 0.7 seconds when the engine was running at 600 RPM or more.
23EST signal did not change when the ECM applied bypass voltage to the ignition module.
24Vehicle speed was 0 for 3 seconds with transmission in drive or reverse and brake off when throttle angle was at least 17 degrees and engine RPM was 1400 or greater.
26Throttle switch input to the PCM was closed for 1.8 seconds while the TPS was between 20 and 75 degrees.
27Throttle switch on the ISC motor never closed during idle operation.
283rd or 4th gear pressure switch was open when vehicle was stopped and transmission was in park or neutral.
30TPS was 14 degrees or more while ISC was retracting for 15 seconds, or TPS was 2 degrees while ISC was extending for 15 seconds.
31MAP sensor was shorted to 5 volts for 0.2 seconds.
32MAP sensor was open showing a reading of 0.5 volts or less for 0.2 seconds.
34MAP sensor signal voltage was too high (low vacuum) for 15 seconds when throttle switch was closed.
37MAT sensor was shorted showing a temperature of 313° F or more.
38MAT sensor was open showing a temperature of -27° F or less.
39Engine RPM was outside of the range expected for indicated vehicle speed for 5 seconds indicating a VCC engagement problem.
40Power steering switch was open when vehicle speed was 45 MPH or more.
41Cam reference pulses were not received when distributor reference pulses were received for 5 seconds at an engine speed of 1600 RPM or less.
42Left oxygen sensor was lean for more than 50 seconds when engine was at normal temperature with an engine speed of 800 RPM or more.
43Left oxygen sensor was rich for more than 50 seconds when engine was at normal temperature with an engine speed of 800 RPM or more.
44Right oxygen sensor was lean for more than 50 seconds when engine was at normal temperature with an engine speed of 800 RPM or more.
45Right oxygen sensor was rich for more than 50 seconds when engine was at normal temperature with an engine speed of 800 RPM or more.
46Left and right fuel control block learn value differed by more than 15 counts for 10 minutes.
47ECM has received bad data from BCM for 3 seconds while engine speed was 500 RPM or more for 5 seconds.
48EGR system fault. Oxygen sensor did not indicate a leaner mixture for at least 3 of 5 tests.
49The oxygen sensor did not show excess oxygen when the air injection system sent air to the exhaust manifold (system had failed 4 times).
51MEM-CAL error.
52ECM has lost primary battery power.
53Distributor reference pulses were not received for 0.4 seconds when engine speed was above 568 RPM.
55TPS zero point was out of range.
58Pass Key fuel enable was not correct.
60Transmission was not in drive when cruise control was engaged.
61Cruise vent solenoid commanded OFF but solenoid remained ON, or commanded ON but solenoid remained OFF.
62Cruise vacuum solenoid commanded OFF but solenoid remained ON, or commanded ON but solenoid remained OFF.
63Vehicle speed was 20 MPH higher than the set speed for 0.5 seconds when cruise control was on.
64Vehicle speed increased more than 16 MPH in 1 second while cruise control was engaged.
65Cruise control servo position was 6.3% or less for 1 second.
66Engine RPM was 4800 or more for 0.25 seconds with cruise control engaged.
67Cruise control Set/Coast or Resume/Accel switch was closed for 10 minutes.
68With cruise control engaged the throttle angle was greater than 20 degrees and servo position sensor indicated a stroke greater than commanded for 2 seconds.
74MAT sensor signal changed 0.3 volts or more in 0.25 seconds.
75Vehicle speed changed by 8 MPH or more in 1 second while MAP sensor remained steady with engine running and brakes not applied.
85The coast down throttle angle offset is more than 5 degrees from the zero value.
90Park/neutral switch was closed when 4th gear switch was open and vehicle speed was between 23 and 35 MPH for 10 seconds.
91Gear selector switch has either an open or a short causing an invalid signal for a forward or reverse gear.
96Throttle 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.
97Gear selector was moved from park or neutral to drive or reverse with engine speed over 2000 RPM but under 6 MPH.
98At a vehicle speed under 6 MPH, the gear selector was moved from park or neutral into drive or reverse when engine speed was 600 RPM greater than determined by PCM and throttle angle was 20 degrees or less.
99Servo position sensor indicated that servo was still engaged after cruise control had been disengaged for 2 seconds. Throttle angle was above 20 degrees.
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