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Trouble Code Charts

TROUBLE CODE IDENTIFICATION

Code System Affected Probable Cause
12 System Normal System Normal
13  O2 Sensor (Open) 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 Sensor or Circuit, ECM
23B (1) MAT Sensor Sensor or Circuit, ECM
24  Vehicle Speed Sensor Sensor or Circuit, 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  O2 Sensor (Lean) Injectors, Fuel Press., EGR, Exhaust Leaks, O2 Sensor or Ckt, MAP Sensor, ECM
45  O2 Sensor (Rich) Injectors, Fuel Press., EGR, O2 Sensor or Ckt, MAP Sensor, TPS, Canister Purge, Ignition Shielding, ECM
51  ECM/PROM Failure ECM or PROM Failure
(1) High temperature indicated by temperature sensor.
(2) Low temperature indicated by temperature sensor.