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.
2008 Chevrolet Optra LS, AutomaticFACTORY OEM SERVICE PROCEDURE
Circuit/System Testing
- If any other IPC indicators or gages are inoperative, refer to Symptoms - Displays and Gages .
- Ignition OFF, disconnect the ECM harness connectors. Ignition ON, the lamp should not illuminate.
- If the lamp is illuminated, test the lamp control circuit for a short to ground. If the circuit tests normal, replace the IPC.
- Ignition ON, connect a 3A fused jumper wire between the lamp control circuit and ground. The lamp should illuminate.
- If the lamp does not illuminate, test the lamp control circuit for a short to voltage, or an open/high resistance. If the circuit tests normal, replace the IPC/bulb.
- If all circuits test normal, replace the ECM.
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.