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Trouble Code Identification

TROUBLE CODE IDENTIFICATION

Code System Affected Probable Cause
12 System Normal System Normal
13 (SOHC)  O2 Sensor (Open/Shorted) Sensor or Circuit, ECM
13 (DOHC)  O2 Sensor (Open/Shorted) Sensor or Circuit, ECM
14A (1) Coolant Temp. Sensor Sensor or Circuit, ECM
14B (2) Coolant Temp. Sensor Sensor or Circuit, ECM
21A  TPS Signal (High) Sensor or Circuit, ECM
21B  TPS Signal (Low) Sensor or Circuit, ECM
23A (2) MAT Sensor (Low) Sensor or Circuit, ECM
23B (1) MAT Sensor (High) Sensor or Circuit, ECM
24  Vehicle Speed Sensor Sensor or Circuit, ECM
32  EGR Control Solenoid EGR Valve, Sensor or Ckt, ECM
33A  MAP Sensor (High) Sensor or Circuit, ECM
33B  MAP Sensor (Low) Sensor or Circuit, ECM
42  Elec. Spark Timing Circuit, Ign. Module, ECM
44 (SOHC)  O2 Sensor (Lean) Injectors, Fuel Pressure, Exhaust Leaks, O2 Sensor or Circuit, ECM
44 (DOHC)  O2 Sensor (Lean) Injectors, Fuel Pressure, Exhaust Leaks, O2 Sensor or Circuit, ECM
45 (SOHC)  O2 Sensor (Rich) Injectors, Fuel Pressure, EGR, O2 Sensor or Circuit, MAP Sensor, TPS, Canister Purge Ignition Shielding, ECM
45 (DOHC)  O2 Sensor (Rich) Injectors, Fuel Pressure, EGR, O2 Sensor or Circuit, MAP Sensor, TPS, Canister Purge Ignition Shielding, ECM
51  ECM/MEM-CAL Failure ECM, EEPROM or MEM-CAL Failure
(1) High temperature indicated by temperature sensor.
(2) Low temperature indicated by temperature sensor.