Section 7 (Engine Controls - Tests W/Codes - ECM)
WARNING: This page is about a different car, the 1990 Buick Riviera and 1990 Buick Reatta. However, it is still accessible from the selected car via links, so may be relevant.
- Entering Self-Diagnostics
- Clearing Trouble Codes
- Manual Operation Of Service Mode
- Diagnostic Charts
- Self-Diagnostic System Check
- Chart A-1, No Service Engine Soon Light
- Chart A-2: "Service Engine Soon" Light Won't Go Out Or Flash
- Code E013: Open Oxygen Sensor Circuit
- Code E014: Coolant Temp Sensor Too High
- Code E015: Coolant Temp Sensor Too Low
- Code E016, Battery Voltage Too High
- Code E021: TPS Signal Voltage High
- Code E022: TPS Signal Voltage Low
- Code E023: Mat Sensor Signal Voltage High
- Code E024: Vehicle Speed Sensor (VSS) Circuit
- Code E025: Mat Sensor Circuit (High Temp Indicated)
- Code E026: Quad-Driver (QDM) Error
- Codes E027, E028 & E029, 2ND, 3RD & 4TH Gear Switch Diagnosis
- Code E031: Park/Neutral Switch Circuit
- Code E034: Mass Airflow Sensor Circuit
- Code E038: Brake Switch Circuit
- Code E039: Torque Converter Clutch (TCC) Circuit
- Code E041: Cam Sensor Circuit
- Code E042, Est Ignition Circuit
- Code E043: Electronic Spark Control (ESC) Circuit
- Code E044: O2 Sensor Circuit (Lean Exhaust Indicated)
- Code E045: O2 Sensor Circuit (Rich Exhaust Indicated)
- Code E046: Power Steering Pressure Switch Circuit
- Code E047: ECM-BCM Data
- Code E048: Misfire Diagnosis
- Code E051: Mem-Cal Error
- Code E058: Vehicle Anti-Theft System (Vats) Fuel Enable
- Codes E063, E064 & E065: Exhaust EGR Circuit