Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1995 Toyota Corolla Base, AutomaticFACTORY OEM SERVICE PROCEDURE
Trouble Code Identification
TROUBLE CODE IDENTIFICATION
| Code | Description |
|---|---|
| 12 | G & NE Signal Circuit (No. 1) |
| 13 | G & NE Signal Circuit (No. 2) |
| 14 | Ignition Signal Circuit |
| 21 | Oxygen Sensor Circuit |
| 22 | Coolant Temperature Sensor (CTS) Circuit |
| 24 | Intake Air Temperature (IAT) Sensor Circuit |
| 25 | Air/Fuel Ratio Lean Malfunction |
| 26 | Air/Fuel Ratio Rich Malfunction |
| 27 | Sub-Oxygen Sensor Circuit (Calif.) |
| 31 | Manifold Absolute Pressure (MAP) Sensor Circuit |
| 41 | Throttle Position Sensor (TPS) Circuit Malfunction |
| 42 | Vehicle Speed Sensor Signal Circuit |
| 43 | Starter Signal Circuit |
| 51 | Switch Condition Signal Circuit |
| 71 | Exhaust Gas Recirculation (EGR) System Malfunction (Calif.) |
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.