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Toyota OBD I Diagnostic Trouble Code Definitions
| 1990, 1991, 1992, 1993, 1994, 1995 EFI Toyota Corolla OBD I Trouble Code Definitions |
|
|---|---|
| Code | Description |
| 11 | ECU Battery Power Malfunction |
| 12 | G and NE Signal Circuit (No. 1) -RPM Signal Problem |
| 13 | G and NE Signal Circuit (No. 2) -RPM Signal Problem |
| 14 | Ignition Signal Circuit |
| 21 | Oxygen Sensor Circuit |
| 22 | Coolant Temp Sensor Circuit |
| 24 | Intake Air Temp Sensor Circuit |
| 25 | Air/Fuel Ratio Lean Malfunction |
| 26 | Air/Fuel Ratio Rich Malfunction |
| 27 | Sub-Oxygen Sensor Circuit (California Only) |
| 31 | Manifold Absolute Pressure (MAP) Sensor Circuit (MAP Sensor Equipped) |
| 31 | Air Flow Meter Sensor Circuit (MAF Sensor Equipped) |
| 41 | Throttle Position Sensor (TPS) Circuit Malfunction |
| 42 | Vehicle Speed Sensor (VSS) Signal Circuit |
| 43 | Starter Signal Circuit |
| 51 | Switch Condition Signal Circuit |
| 52 | Knock Sensor Signal Malfunction |
| 53 | Knock Control in ECU Fault |
| 71 | EGR System Malfunction |
| 72 | Fuel Cut Solenoid Signal Malfunction |
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