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 Code Charts Diagnostic Circuit Check Chart A-1, Won't Flash Code 12/No Check Engine Light Diagnostic Aids Chart A-2, No ALDL Data Or Won't Flash Code 12/Check Eng Light On Steady Code 13, O2 Sensor CKT/Open CKT (VIN 5) Code 13, O2 Sensor CKT/Open CKT (VIN 6) Code 14, Coolant Temp Sensor CKT/High Temp Indicated Code 14, Coolant Temp Sensor CKT/Low Temp Indicated Code 21, Throttle Pos Sensor CKT/Signal Voltage High Code 21, Throttle Pos Sensor CKT/Signal Voltage Low Code 23, Intake Air Temp Sensor CKT Low Temp Indicated Code 23, Intake Air Temp CKT/High Temp Indicated Code 24, Vehicle Speed Sensor Circuit Code 32, EGR System Error (CALIF. Only) Code 33, Map Sensor CKT/Signal Voltage High-Low Vacuum Code 33, Map Sensor CKT/Signal Voltage Low-High Vacuum Code 42, Electronic Spark Timing Code 44, O2 Sensor CKT/Lean Exhaust Indicated Code 45, O2 Sensor CKT/Rich Exhaust Indicated Code 51, ECM Failure/ECM Failed Or Prom Failure Summary