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Trouble Code Definition

FAULT CODES

Code Component Circuit Fault
12 HEI Reference Signal KOEO (Normal Condition)
13 O2 Sensor Open Circuit
14 Coolant Temp. Sensor High Temperature Signal
15 Coolant Temp. Sensor Low Temperature Signal
21 Throttle Position Sensor Signal Voltage High
22 Throttle Position Sensor Signal Voltage Low
24 Vehicle Speed Sensor Signal Fault
32 EGR System System Failure
33 MAP Sensor Signal Voltage High (Low Vacuum)
34 MAP Sensor Signal Voltage Low (High Vacuum)
42 Elec. Spark Timing Circuit Signal Fault
44 O2 Sensor Circuit Lean Exhaust Signal
45 O2 Sensor Circuit Rich Exhaust Signal
51 Faulty MEM-CAL Circuit Fault
53 System Voltage Overvoltage Signal