Diagnostic Trouble Code List

TROUBLE CODE DESCRIPTION

DTC 12 This check indicates that the on-board diagnostic system is functioning. If no other codes are present, the cycle will repeat until diagnostic mode is exited.


DTC 13 Oxygen sensor circuit openDTC 13

DTC 14 Engine coolant temperature sensor circuit, high temperature indicated (low circuit resistance indicates grounded circuit to ECM or shorted sensor)DTC 14

DTC 15 Engine coolant temperature sensor circuit, low temperature indicated (high circuit resistance indicates open circuit to ECM or open sensor)DTC 15

DTC 21 Throttle position sensor circuit (signal voltage high)DTC 21

DTC 22 Throttle position sensor circuit (signal voltage low)DTC 22

DTC 24 Vehicle speed sensor circuitDTC 24

DTC 32 EGR system failureDTC 32

DTC 33 MAP sensor circuit (signal voltage high, low vacuum)DTC 33

DTC 34 MAP sensor circuit (signal voltage low, high vacuum)DTC 34

DTC 42 Electronic spark timing (EST) circuitDTC 12

DTC 43 Electronic spark control (ESC) circuitDTC 43

DTC 44 Oxygen sensor circuit (lean indication)DTC 44

DTC 45 Oxygen sensor circuit (rich indication)DTC 45

DTC 51 PROM error (faulty or incorrectly installed PROM or incorrect PROM for application)DTC 51

DTC 52 CALPAK error (faulty or incorrect CALPAK

DTC 54 Fuel pump circuit (low voltage)DTC 54

DTC 55 ECM errorDTC 55