Section 16 (Engine Controls - Tests W/Codes - 3.8L PFI)
WARNING: This page is about a different car, the 1990 Pontiac Bonneville, 1990 Oldsmobile Ninety-Eight, 1990 Oldsmobile Eighty-Eight, 1990 Buick LeSabre, and 1990 Buick Electra. 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
- Hard Or Intermittent Trouble Code Determination
- Clearing Trouble Codes
- ECM Location
- Diagnostic Materials
- Scan Tester Usage
- Diagnostic Code Charts: 13 - 65
- Notes
- Code 13: Open Oxygen Sensor Circuit
- Code 14: Coolant Temp Sensor Signal Volt Low
- Code 15: Coolant Temp Sensor Signal Volt High
- Code 16: System Voltage High
- Code 21: TPS Signal Volt High
- Code 22: TPS Signal Volt Low
- Code 23: Mat Sensor Signal Volt High
- Code 24: Vehicle Speed Sensor (VSS)
- Code 25: Mat Sensor Signal Volt High
- Code 26: Quad-Driver Circuit
- Code 27, 28 Or 29: Gear Switch Circuits
- Code 31: Park/Neutral Switch Circuit
- Code 34: Mass Airflow Sensor
- Code 38: Brake Switch Circuit
- Code 39: TCC Circuit (W/440-T4 Trans)
- Code 41: Cam Sensor Circuit
- Code 42: Est Ignition Circuit
- Code 43: Electronic Spark Control
- Code 44: Lean Exhaust Indication
- Code 45: Rich Exhaust Indication
- Code 46: Power Steering Pressure Switch
- Code 48: Misfire Diagnosis
- Code 51, Mem-Cal Error
- Code 63, 64 Or 65, EGR Flow Check 3.8L