1986-1991 ECM Codes
1985 to 1991 Computer 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. |
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