Section 14 (Engine Controls - Tests W/Codes - 3.1L PFI)
WARNING: This page does not describe the selected car, but rather 11 other vehicles, including the 1990 Pontiac Grand Prix, 1990 Pontiac Firebird, 1990 Pontiac 6000, 1990 Oldsmobile Cutlass Supreme, and 1990 Chevrolet Lumina. However, it is still accessible from the selected car via links, so may be relevant.
- Introduction
- Self-Diagnostic System
- Diagnostic Tests
- Notes
- Code 13: Open Oxygen Sensor Circuit
- Code 14: Coolant Temp Sensor (Cts) Signal Voltage Low
- Code 15: Coolant Temp Sensor (Cts) Signal Voltage High
- Code 21: TPS Signal Voltage High
- Code 22: TPS Signal Voltage Low
- Code 23: Mat Sensor Signal Voltage High
- Code 24: Vehicle Speed Sensor
- Code 25: Mat Signal Voltage Low
- Code 31: WASTEGATE OVERBOOST (W Body Turbo)
- Code 32: EGR System Failure (Except W Body)
- Code 32: EGR System Failure (W Body Turbo)
- Code 32: EGR System Failure (W Body Non-Turbo)
- Code 33: Map Sensor Signal Voltage High
- Code 34: Map Signal Voltage Low
- Code 35: Idle Speed Error
- Code 41: Cylinder Select Error
- Code 42: Elect Spark Timing 3.1L W/Dis (Except F Body)
- Code 42: Elect Spark Timing (W/HEI)
- Code 43: Elect Spark Control
- Code 44: Lean Exhaust Indication
- Code 45: Rich Exhaust Indication
- Code 51: Mem-Cal Error
- Code 52: CALPAK/Mem-Cal Error
- Code 53: System OVERVOLTAGE
- Code 54: Fuel Pump Volt Low (Except J & W Body)
- Code 54: Fuel Pump Volt Low (J Body)
- Code 54: Fuel Pump Volt Low (W Body)
- Code 55: ECM Error (3.1L W Body Non-Turbo)
- Code 61: Degraded Oxygen Sensor (3.1L)
- Code 62: Gear Switch Error (A Body)
- Code 62: Gear Switch Error (3.1L J Body)
- Code 62: Gear Switch Error (3.1L L Body)
- Code 66: A/C Pressure Sensor (3.1L J Body)
- Summary