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 543 (ENGINE CONTROLS AND FUEL - 3.9L - DTC P0010 TO DTC P0353)DTC P0351, P0352, OR P0353CIRCUIT/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 2007 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.
- With the engine running, observe the Cylinder 1 and 4 IC Circuit Status, Cylinder 2 and 5 IC Circuit Status, and the Cylinder 3 and 6 IC Circuit Status parameters with the scan tool.
- If a parameter displays short Gnd/Open, test for an open/high resistance or a short to ground in the affected IC circuit. All wire circuit resistance should measure less than 2 ohms.
- If a parameter displays short to B+, test for a short to voltage in the affected IC circuit.
- Connect jumper wires from the harness connector of the ICM to the corresponding terminals of the ICM.
- Using the jumper wires, exchange the affected IC control circuit with a known good IC control circuit. Also exchange the spark plug wires of the corresponding coils.
- Start the engine.
- Observe the Misfire Current counters with the scan tool.
- If the misfire transfers with the suspect IC control circuit, replace the ECM.
- If the misfire remains with the coil, replace the ICM.
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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.