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Trouble Code Identification

TROUBLE CODE IDENTIFICATION

Code System Affected MIL Probable Cause
12  RPM Signal ON Distributor, Starter Or Circuit, ECM
13  RPM Signal ON Distributor Or Circuit,ECM
14  Ignition Signal ON Ignitor Or Circuit To ECM, ECM
21  Oxygen Sensor Signal ON Oxygen Sensor/Heater Or Circuit, ECM
22  Engine Coolant Temperature Sensor Signal ON Engine Coolant Temp. Sensor Or Circuit, ECM
24  Intake Air Temperature Sensor Signal ON (1) Intake Air Temp. SensorOr Circuit, ECM
25  Lean Air/Fuel Mixture ON Loose Ground, Injector Or Circuit, Oxygen Sensor Or Circuit, FuelPressure, Ignition System, Engine Coolant Temp. Sensor, Airflow Meter, ECM
26 (2) Rich Air/Fuel Mixture ON Loose Ground, Injector Or Circuit, Oxygen Sensor Or Circuit, FuelPressure, Cold Start Injector Or Circuit, Engine Coolant Temp. Sensor, Airflow Meter, Compression Pressure, ECM
27 (2) Oxygen Sensor Signal ON Oxygen Sensor Or Circuit, ECM
31  Airflow Meter Signal ON Airflow Meter Or Circuit, ECM
32  Airflow Meter Signal ON Airflow Meter Or Circuit, ECM
41  Throttle Position Sensor Signal ON (1) Throttle Position Sensor Or Circuit, ECM
42  Vehicle Speed Sensor Signal OFF Vehicle Speed Sensor Or Circuit, ECM
43  Starter Signal OFF Starter Signal Circuit,Main Relay, Ignition Switch Or Circuit, ECM
51  Switch Condition Signal OFF A/C Switch Circuit, Neutral Start Switch OrCircuit, TPS Or Circuit, ECM
52  Knock Sensor Signal ON Knock Sensor Or Circuit, ECM
53  Knock Sensor Control Signal ON ECM
71 (2) EGR System Malfunction ON EGR System, EGR Temp. Sensor Or Circuit, EGR-VSV, ECM
(1) The MIL will be illuminated on California vehicles only.
(2) Applies to California models only.