1991-95 Models
Code 88-Display used for start of test.
Code 11-Camshaft signal or Ignition signal-no reference signal detected during engine cranking.
Code 12-Memory to controller has been cleared within 50-l00 engine starts.
Code 13-MAP sensor pneumatic signal-no variation in MAP sensor signal is detected or no difference is recognized between the engine MAP reading and the stored barometric pressure reading..
Code 14-MAP voltage too high or too low.
Code 15-Vehicle speed sensor signal-no distance sensor signal detected during road load conditions.
Code 16-Knock sensor circuit-Open or short has been detected in the knock sensor circuit.
Code 16-Battery input sensor-battery voltage sensor input below 4 volts with engine running.
Code 17-Low engine temperature-engine coolant temperature remains below normal operating temperature during vehicle travel; possible thermostat problem.
Code 21-Oxygen sensor signal-neither rich or lean condition is detected from the oxygen sensor input.
Code 22-Coolant voltage low-coolant temperature sensor input below the minimum acceptable voltage/Coolant voltage high-coolant temperature sensor input above the maximum acceptable voltage.
Code 23-Air Charge or Throttle Body temperature voltage HIGH/LOW-charge air temperature sensor input is above or below the acceptable voltage limits.
Code 24-Throttle Position sensor voltage high or low.
Code 25-Automatic Idle Speed (AIS) motor driver circuit-short or open detected in 1 or more of the AIS control circuits.
Code 26-Injectors No. 1, 2, or 3 peak current not reached, high resistance in circuit.
Code 27 -Injector control circuit-bank output driver stage does not respond properly to the control signal.
Code 27-Injectors No. 1, 2, or 3 control circuit and peak current not reached.
Code 31-Purge solenoid circuit-open or short detected in the purge solenoid circuit.
Code 32-Exhaust Gas Recirculation (EGR) solenoid circuit-open or short detected in the EGR solenoid circuit/EGR system failure-required change in fuel/air ratio not detected during diagnostic test.
Code 33-Air conditioner clutch relay circuit-open or short detected in the air conditioner clutch relay circuit. If vehicle doesn't have air conditioning ignore this code.
Code 34-Speed control servo solenoids or MUX speed control circuit HIGH/LOW-open or short detected in the vacuum or vent solenoid circuits or speed control switch input above or below allowable voltage.
Code 35-Radiator fan control relay circuit-open or short detected in the radiator fan relay circuit.
Code 35-Idle switch shorted-switch input shorted to ground-some 1993 vehicles.
Code 37-Part Throttle Unlock (PTU) circuit for torque converter clutch-open or short detected in the torque converter part throttle unlock solenoid circuit.
Code 37-Baro Reed Solenoid-solenoid does not turn off when it should.
Code 37-Shift indicator circuit (manual transaxle).
Code 41-Charging system circuit-output driver stage for generator field does not respond properly to the voltage regulator control signal.
Code 42-Fuel pump or no Autoshut-down (ASD) relay voltage sense at controller.
Code 43-Ignition control circuit-peak primary circuit current not respond properly with maximum dwell time.
Code 43-Ignition coil #1, 2, or 3 primary circuits-peak primary was not achieved within the maximum allowable dwell time.
Code 44-Battery temperature voltage-problem exists in the PCM battery temperature circuit or there is an open or short in the engine coolant temperature circuit.
Code 44-Fused J2 circuit in not present in the logic board; used on the single engine module controller system.
Code 44-Overdrive solenoid circuit-open or short in overdrive solenoid circuit.
Code 46-Battery voltage too high-battery voltage sense input above target charging voltage during engine operation.
Code 47-Battery voltage too low-battery voltage sense input below target charging voltage.
Code 51-Air/fuel at limit-oxygen sensor signal input indicates LEAN air/fuel ratio condition during engine operation.
Code 52-Air/fuel at limit-oxygen sensor signal input indicates RICH air/fuel ratio condition during engine operation.
Code 53-Internal controller failure-internal engine controller fault condition detected during self test.
Code 54-Camshaft or (distributor sync.) reference circuit-No camshaft position sensor signal detected during engine rotation.
Code 55-End of message.
Code 61-Baro read solenoid-open or short detected in the baro read solenoid circuit.
Code 62-EMR mileage not stored-unsuccessful attempt to update EMR mileage in the controller EEPROM.
Code 63-EEPROM write denied-unsuccessful attempt to write to an EEPROM location by the controller.
Code 64-Flex fuel sensor- Flex fuel sensor signal out of range-(new in 1993)-CNG Temperature voltage out of range-CN gas pressure out of range.
Code 66-No CCD messages or no BODY CCD messages or no EATX CCD messages-messages from the CCD bus or the BODY CCD or the EATX CCD were not received by the PCM.
Code 76-Ballast bypass relay-open or short in fuel pump relay circuit.
Code 77-Speed control relay-an open or short has been detected in the speed control relay.
Code 88-Display used for start of test.
Code Error-Fault code error-Unrecognized fault ID received by DRBII.
