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.
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HOMESERVICE MANUALSCHEVROLET2006COBALT SS, 4D SEDAN, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 385 (ENGINE CONTROL SYSTEM - 3.5L - DTC P0442 TO DTC P2A01)DTC P0650CIRCUIT/SYSTEM TESTING
2006 Chevrolet Cobalt SS, 4D Sedan, Standard
Circuit/System Testing
2006 Chevrolet Cobalt SS, 4D Sedan, StandardSECTION Circuit/System Testing
WARNING: This page is about a different car, the 2006 Chevrolet Monte Carlo and 2006 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.
- Disconnect the engine control module (ECM) connector that contains the MIL control circuit.
- Jumper the MIL control circuit with a J 36169-A at the ECM connector to a good ground.
- Turn ON the ignition with the engine OFF.
- If the MIL illuminates replace the ECM.
- Test the MIL voltage supply circuit for an open or short to ground.
- Test the MIL control circuit for a short to voltage or a short to ground.
- If the all circuits test OK replace the instrument panel cluster assembly.
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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.