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HOMESERVICE MANUALSCHEVROLET2006COBALT SS, 4D SEDAN, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 705 (ENGINE CONTROL SYSTEM & FUEL SYSTEM - 2.2L (L61) - DTC P0016 TO DTC P0411)DTC P0351-P0354CIRCUIT/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 2008 Pontiac G5 and 2008 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.
  1. Turn OFF the ignition.
  2. Disconnect the ECM.
  3. Test the affected IC circuit terminal 3 or C for an open, a high resistance, a short to ground and for a short to voltage.
    • If a fault is found, repair the circuit as needed.
  4. Connect the ECM.
  5. Exchange the affected ignition coil/module with the ignition/coil module of a good cylinder.
  6. Start the engine and observe the scan tool.
    • If the DTC or the misfire transfers with the suspect ignition/coil module, replace as needed.
    • If the DTC or the misfire does not transfer with the suspect ignition/coil module, replace the ECM.
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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.