Welcome to The Rock Ridge Farm Corvette ECM page


I found this on another site but could not link to it so I re-did it here.


C4 Corvette ECM Codes


1985 Corvett ECM Codes

       Code #12: Normal No Codes.

       Code #13: Open Oxygen Sensor Circuit.

       Code #14: Coolant Sensor Circuit Low.

       Code #15: Coolant Sensor Circuit High.

       Code #21: Throttle Position Sensor High.

       Code #22: Throttle Position Sensor Low.

       Code #23: Manifold Air Temperature Circuit High.

       Code #24: Vehicle Speed Sensor.

       Code #25: Manifold Air Temperature Circuit Low.

       Code #32: EGR System Failure.

       Code #33: Mass Air Flow Sensor High.

       Code #34: Mass Air Flow Sensor Low.

       Code #36: Mas Air Flow Sensor Burn-Off Function Fault.

       Code #41: Cylinder Select Error.

       Code #42: Electronic Spark Timing.

       Code #43: Electronic Spark Control.

       Code #44: Lean Exhaust indication.

       Code #45: Rich Exhaust Indication.

       Code #46: Vehicle Anti Theft Fault.

       Code #51: Faulty Mem-Cal.

       Code #52: Fuel Calpak Missing.

       Code #52: (1990-91 Corvette Only): Engine Oil Temperature Sensor Low.

       Code #53: System Over Voltage.

       Code #54: Fuel Pump Circuit Low Voltage.

       Code #55: Defective ECM.

       Code #62: Engine Oil Temperature Sensor Circuit High.