All Info About Auto Repairs
Your One Stop Source For All The Information You Need For Your Vehicles.

Diagnostic Trouble Codes - 1995 Pontiac

 13  Open Oxygen Sensor Circuit
 14  Coolant Temperature Sensor (High Temp Indicated)
 15  Coolant Temperature Sensor (Low Temp Indicated)
 16  System Voltage Low
 17  Camshaft Position Sensor Circuit Error
 21  Throttle Position Sensor (Signal Voltage High)
 22  Throttle Position Sensor (Signal Voltage Low)
 23  Intake Air Temperature (IAT) Sensor Circuit
 24  Vehicle Speed Sensor (VSS) Circuit
 25  Intake Air Temp (IAT) Sensor (High Temp Indicated)
 26  Quad Driver Fault
 28  Transaxle Range Switch Error
 33  MAP Sensor Circuit (Signal Voltage High
 34  Mass Air Flow Sensor (MAF) Circuit
 35  Idle Air Control (IAC) System
 36  Ignition 24X Signal Circuit Error
 37  TCC Brake Switch Error
 41  Ignition Control (IC) Timing Circuit Error
 42  Ignition Control (IC) Circuit
 43  Knock Sensor (KS) Circuit
 44  Oxygen Sensor Circuit (Lean Exhaust Indicated)
 45  Oxygen Sensor Circuit (Rich Exhaust Indicated)
 51  Mem-Cal Error
 53  System Voltage High
 54  Fuel Pump Circuit (Low Voltage)
 58  Transmission Temperature Sensor Circuit (High Temp)
 59  Trans Fluid Temp (TFT) Sensor (High Voltage/Low Temp)
 66  Low A/C Refrigerant Charge
 70  A/C Pressure Sensor (High) Circuit
 72  Vehicle Speed Sensor (VSS) Circuit
 75  Digital EGR #1 Solenoid Error
 76  Digital EGR #2 Solenoid Error
 77  Digital EGR #3 Solenoid Error
 79  Transmission Fluid - Over Temperature
 80  Transmission Component Slipping
 82  Ignition Control 3X Signal Error
 85  PROM Error
 86  Analog/Digital (A/D) Error
 87  Erasable Programmable Read Only Memory (EEPROM) Error
 90  TCC Error
 96  Transmission System Voltage Low
 98 
 99 
Invalid PCM Program

To extract a trouble from the computer for diagnostic purposes, the Assembly Line Communication Link (ALDL) connector is used.

Ground terminals A and B with the ignition "ON" and engine not running. The system will enter the diagnostic mode. In this mode, the computer will display a 12, three consecutive times, by flashing the "CHECK ENGINE", "SERVICE ENGINE SOON" or "MALFUNCTION INDICATOR LAMP" or light. A 12 consists of one flash, a short pause, then two flashes in rapid succession.

After 12 is displayed, any stored trouble s will be displayed by flashing the "CHECK ENGINE", "SERVICE ENGINE SOON" or "MALFUNCTION INDICATOR LAMP" light. All s are displayed 3 times each then a 12 will repeat. In the diagnostic mode, the computer will also energize all computer controlled relays and solenoids.


ALDL Connector (Located Underdash)

The ALDL diagnostic connector is located in the passenger compartment.

Back to Index
Additional Information provided courtesy of
ALLDATAdiy.com and Warranty Direct
© 2000-2007 Vincent T. Ciulla

FREE Newsletter. Sign Up Now!

Help keep this site free.



Copyright (c)2006



Search All Info About


Related Articles