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 (MFI - CALIF. & New YORK) Diagnostic Code Charts (TBI - Federal) Notes On-Board Diagnostic (OBD) System Check - (TBI Federal) Chart A-1 (TBI Federal) - No Malfunction Indicator Light (Mil) Chart A-2 (TBI Federal) - Won't Flash Any Codes, Or (Mil) On Steady Code 13 (TBI Federal) - Heated Oxygen Sensor Circuit, Open Circuit Code 14, Engine Coolant Temperature Sensor, Low Temperature Indicated (Tracker - TBI Federal) Code 15 (TBI Federal) - Engine Coolant Temperature Sensor, High Temperature Indicated Code 21 (TBI Federal) - Throttle Position (TP) Sensor, Signal Voltage High Code 22 (TBI Federal) - Throttle Position (TP) Sensor, Signal Voltage Low Code 23 (TBI Federal) - Intake Air Temperature Sensor, Low Temperature Indicated Code 24 (TBI Federal) - Vehicle Speed Sensor (VSS) Circuit Code 25 (TBI Federal) - Intake Air Temperature Sensor, High Temperature Indicated Code 31 (TBI Federal) - Manifold Absolute Pressure Sensor, High Voltage - High Vacuum Code 32 (TBI Federal) - Manifold Absolute Pressure Sensor, Low Voltage - Low Vacuum Code 41 (TBI Federal) - No Ignition Signal Code 42 (TBI Federal) - No Camshaft Position Signal For 2 Seconds Code 44 (TBI Federal) - Idle Switch Open Or MISADJUSTED Code 45 (TBI Federal) - Idle Switch Grounded Or MISADJUSTED Code 51 (TBI Federal) - Exhaust Gas RECIRCULATION Circuit Code 53 (TBI Federal) - Open Ground Circuit Summary