October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.
Engine Controls - Tests W/Codes Expand All (for easy ctrl-f) Collapse All Introduction Self-Diagnostic System Diagnostic Circuit Check Chart A-1, Won't Flash Code 12 No Check Engine Light Chart A-2, No ALDL Data Or Won't Flash Code 12 Check Engine Light On At All Times Code 13, Oxygen Sensor Circuit (Non-Heated O2 Sensor Only) Open Or Grounded Circuit Code 14A, Coolant Temperature Sensor (Cts) Circuit High Temperature Indicated Code 14B, Coolant Temperature Sensor (Cts) Circuit Low Temperature Indicated Code 21A, Throttle Position Sensor Circuit Code 21B, Throttle Position Sensor Circuit Code 23A, Manifold Air Temperature (Mat) Sensor Circuit Low Temperature Indicated Code 23B, Manifold Air Temperature (Mat) Sensor Circuit High Temperature Indicated Code 24, Vehicle Speed Sensor Circuit Code 33A, Manifold Absolute Pressure (Map) Sensor Circuit Signal Voltage High-Low Vacuum Code 33B, Manifold Absolute Pressure (Map) Sensor Circuit Signal Voltage Low-High Vacuum Code 42, Electronic Spark Timing (Est) Code 44, Oxygen Sensor Circuit Lean Exhaust Indicated (VIN 5) Code 44, Oxygen Sensor Circuit Lean Exhaust Indicated VIN 6) Code 45, Oxygen Sensor Circuit Rich Exhaust Indicated Code 51, ECM Failure ECM Failed Or Prom Failure Summary