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Diagnostic Trouble Codes - 1995 Cadillac

 P012  No Distributor Reference Signal
 P013  Rear Oxygen Sensor Not Ready
 P014  Shorted Coolant Sensor
 P015  Open Coolant Sensor
 P016  Generator Voltage Out of Range
 P017  Front Oxygen Sensor Not Ready
 P019  Shorted Fuel Pump Circuit
 P020  Open Fuel Pump Circuit
 P021  Shorted Throttle Position Sensor
 P022  Open Throttle Position Sensor
 P023  Ignition Control Circuit Problem
 P024  Speed Sensor Circuit Problem
 P026  Shorted Throttle Switch Circuit
 P027  Open Throttle Switch Signal
 P030  ISC RPM Out Of Range
 P031  Shorted MAP Sensor Signal
 P032  Open MAP Sensor Signal
 P034  MAP Sensor Signal Out Of Range
 P037  Shorted MAT Sensor Signal
 P038  Open IAT Sensor Signal
 P039  TCC Engagement Problem
 P040  Power Steering Pressure Switch Signal
 P041  Cam Sensor Signal Problem
 P042  Front Oxygen Sensor Signal Lean
 P043  Front Oxygen Sensor Signal Lean
 P044  Rear Oxygen Sensor Signal Lean
 P045  Rear Oxygen Sensor Signal Rich
 P046  Front to Rear Bank Fueling Difference
 P047  PCM/IPC Data Problem
 P048  EGR System Problem
 P051  PROM Checksum Mismatch
 P052  PCM Keep Alive Memory Reset
 P053  Distributor Signal Interrupt
 P055  Closed Throttle Angle Out of Range
 P057  Shorted Transaxle Temp Sensor Circuit
 P058  Pass Key Control Problem
 P059  Open Transaxle Temp Sensor Circuit
 P060  Cruise - Not In Drive
 P061  Cruise - Vent Solenoid Problem
 P062  Cruise - Vacuum Solenoid Problem
 P063  Cruise - Set Speed vs Vehicle Speed
 P064  Cruise - Acceleration Too High
 P065  Cruise - Servo Position Signal Problem
 P066  Cruise - Engine RPM Too High
 P067  Cruise - Switch Shorted
 P068  Cruise - Command Problem
 P070  Intermittent TPS
 P071  Intermittent MAP
 P073  Intermittent Coolant Sensor
 P074  Intermittent IAT Sensor Signal
 P075  Intermittent VSS Signal
 P085  Idle Throttle Angle Too High
 P090  Cruise - VCC Brake Switch Signal Problem
 P091  Cruise - PRNDL Switch Problem
 P092  Heated Windshield Request Problem
 P096  Torque Converter Overstress
 P097  P/N To D/R Engagement Problem
 P098  P/N To D/R ISC Engaged Problem
 P099  Cruise - Servo Apply Problem

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.

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Additional Information provided courtesy of and Warranty Direct
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