ECM/PCM Code Description

CODE 13 - Oxygen Sensor Circuit
CODE 14 - Engine Coolant Temperature (ECT) Sensor Circuit (High Temp.)
CODE 15 - Engine Coolant Temperature (ECT) Sensor Circuit (Low Temp.)
CODE 21 - Throttle Position Sensor (TPS) Circuit (High Sig.)
CODE 22 - Throttle Position Sensor (TPS) Circuit (Low Sig.)
CODE 24 - Vehicle Speed Sensor (VSS) Circuit
CODE 32 - Exhaust Gas Recirculation (EGR)
CODE 33 - Manifold Absolute Pressure (MAP) Sensor Circuit (High Sig.)
CODE 34 - Manifold Absolute Pressure (MAP) Sensor Circuit (Low Sig.)
CODE 42 - Ignition Control (IC) Circuit
CODE 43 - Knock Sensor (KS) Circuit
CODE 44 - Oxygen Sensor Circuit (Lean Exhaust Indicated)
CODE 45 - Oxygen Sensor Circuit (Rich Exhaust Indicated)
CODE 51 - PROM (MEM/CAL) problem
CODE 52 - CAL-PAK Error - Faulty or Incorrect CAL-PAK
CODE 54 - Fuel Pump Circuit - Low Voltage
CODE 55 - ECM Error

If a Trouble Code not listed above appears on Tech 1, ground DLC diagnostic terminal "B" and observe flashed Code(s).
If Code does not reappear, refer to Tech 1 Operator's Guide.
If Code does reappear, check for incorrect or faulty PROM.