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Trouble Code Definition

ECM/PCM TROUBLE CODE DEFINITION

Code No. Circuit Affected
12 (1) No RPM Reference Pulse
13
Single Sensor Models Oxygen Sensor Circuit Open
Dual Sensor Models Left Oxygen Sensor Circuit Open
14 Coolant Temperature Sensor Signal Voltage Low
15 Coolant Temperature Sensor Signal Voltage High
19 Intermittent 7X Signal
21 TPS Signal Voltage High
22 TPS Signal Voltage Low
23 MAT Sensor Signal Voltage High
24 Vehicle Speed Sensor
25 MAT Sensor Signal Voltage Low
26 Quad-Driver Error
27 Or 28 Quad-Driver Error
29 Quad-Driver Error
32 EGR System Error
33 MAP Sensor Signal Voltage High
34 MAP Sensor Signal Voltage Low
35 IAC Idle Speed Error
43 ESC (Knock Sensor) Error
44
Single Sensor Models Lean Exhaust Indication
Dual Sensor Models Left Lean Exhaust Indication
45
Single Sensor Models Rich Exhaust Indication
Dual Sensor Models Left Rich Exhaust Indication
51 Faulty PROM, MEM-CAL Or ECM/PCM
53 System Overvoltage
55 ECM/PCM Error Fuel Lean Monitor
58 Transmission Fluid Temp. High
59 Transmission Fluid Temp. Low
63 Right Oxygen Sensor Circuit Open (Dual-Sensor Models)
64 Right Oxygen Sensor Lean (Dual-Sensor Models)
65
Single Sensor Models Injector Current Low
Dual Sensor Models Right Oxygen Sensor Rich
66 A/C Pressure Sensor
67 A/C Pressure Sensor
79 VSS Signal Voltage High
80 Transmission Component Error
(1) Display of a Code 12 is normal when reference pulses are not being received by control module (engine not running).
NOTE: Use trouble code charts only if SERVICE ENGINE SOON light is illuminated (indicating a current problem exists).