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 861 (ENGINE CONTROLS AND FUEL - 2.0L - DTC P0700 TO DTC P2544)DTC P2105CIRCUIT/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 2010 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF, remove the fuse that supplies voltage to terminal 5 X2 of the K20 Engine Control Module. Verify the fuse is OK.
- If the fuse is open, test the ignition voltage circuit between the open fuse and the K20 Engine Control Module terminal 5 X2 for an intermittent short to ground.
NOTE: This DTC will only set if the fuse is open and the circuits are not grounded. The ignition voltage circuits must be tested thoroughly for an intermittent short to ground. - Install the fuse.
- Disconnect the harness connectors of the K20 Engine Control Module.
- Ignition ON, load test for B+ on the ignition circuit terminal 5 X2 of the K20 Engine Control Module connector.
- If less than B+, repair the ignition circuit for an open/high resistance.
- If all circuits/connections test OK, replace the K20 Engine Control Module.
RENDER: 1.0x
NO RELATED
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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.