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Trouble Code Definition

TROUBLE CODE IDENTIFICATION

Code System Affected Probable Cause
12 System Normal System Normal
13  Oxygen Sensor Circuit Sensor or Circuit, ECM
14  (1) ECT Sensor Sensor Or Circuit, ECM
15  (2) ECT Sensor Sensor Or Circuit, ECM
21  (3) Throttle Position Sensor Sensor Or Circuit, ECM
22  (4) Throttle Position Sensor Sensor Or Circuit, ECM
23  (1) IAT Sensor Circuit Sensor Or Circuit, ECM
24  Vehicle Speed Sensor Sensor Or Circuit, ECM
25  (2) IAT Sensor Circuit Sensor Or Circuit, ECM
31  (3) MAP Sensor Circuit Sensor Or Circuit, ECM
32  (4) MAP Sensor Circuit Sensor Or Circuit, ECM
41  (5) Ignition Signal Circuit Ignition Coil, Ignitor, Wiring Ckt, ECM
42  Crank Angle Sensor Sensor, Wiring, ECM
44  (6) Idle Switch Circuit Open TPS, Wiring, ECM
45  (6) Idle Switch Circuit Shorted TPS, Wiring, ECM
51  (1) EGR System Circuit Check EGR, Wiring, ECM, Vacuum Switching Valve
53 (7) (6) ECM Ground Circuit Open Wiring, ECM
54 (8) (6) Gear Position (5th Gear Switch) 5th Gear Switch, Wiring, ECM
71 (8) Test Switch Circuit Wiring, ECM
(1) Low temperature is indicated.
(2) High temperature is indicated.
(3) High voltage is indicated.
(4) Low voltage is indicated.
(5) Code 41 is not stored in ECM memory. To check code when engine fails to start, crank engine, and then, with ignition still on, install fuse in diagnostic terminal of fuse block.
(6) When code occurs, ECM will not activate MIL while engine is running. When problem is fixed, memory of defective area will be erased from ECM.
(7) California models only.
(8) Federal models only.