Section 11 (Engine Controls - Tests W/Codes - 2.5L TBI)
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 1990 Pontiac Grand Am, 1990 Pontiac 6000, 1990 Oldsmobile Cutlass Cruiser, 1990 Oldsmobile Cutlass Ciera, and 1990 Oldsmobile Cutlass Calais. However, it is still accessible from the selected car via links, so may be relevant.
- Introduction
- Diagnostic Procedure
- Retrieving Codes (Non-Scan)
- Reading Trouble Codes
- ECM Trouble Code Definition Table
- Hard Or Intermittent Trouble Code Determination
- Clearing Trouble Codes
- ECM Location
- Diagnostic Materials
- Scan Tester Usage
- Diagnostic Codes
- Code 13, Open Oxygen Sensor Circuit
- Code 14, Coolant Sensor Signal Voltage Low
- Code 15, Coolant Sensor Signal Voltage High
- Code 21, TPS Signal Voltage High
- Code 22, TPS Signal Low
- Code 23: Mat Sensor Temp Low
- Code 24: VSS
- Code 25: Mat Sensor Temp High
- Code 32: EGR System Error
- Code 33: Map Sensor Signal Voltage High
- Code 34: Map Sensor Signal Voltage Low
- Code 35: Idle Speed Error (A & N Body)
- Code 35: Idle Speed Error (W Body)
- Code 42, Elect Spark Timing W/Dis
- Code 44, Lean Exhaust Indication
- Code 45: Rich Exhaust Indication
- Code 51, Faulty Prom/Mem-Cal
- Code 53, System OVERVOLTAGE