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 743 (IMMOBILIZER SYSTEM)SYMPTOM TROUBLESHOOTING INDEX
2006 Chevrolet Cobalt SS, 4D Sedan, Standard
Symptom Troubleshooting Index
2006 Chevrolet Cobalt SS, 4D Sedan, StandardSECTION Symptom Troubleshooting Index
WARNING: This page is about a different car, the 2011 Honda Insight and 2010 Honda Insight. However, it is still accessible from the selected car via links, so may be relevant.
Troubleshoot the immobilizer system in the order shown:
SYMPTOM TROUBLESHOOTING INDEX
| Order of Priority | Symptom | Possible cause |
|---|---|---|
| 1 | Immobilizer indicator blinks. | Symptom troubleshooting (see SYMPTOM TROUBLESHOOTING ). |
| 2 | Engine does not start with the immobilizer key. | Symptom troubleshooting (see ENGINE DOES NOT START WITH THE IMMOBILIZER KEY ). |
| 3 | Immobilizer indicator does not come on. | Check the MIL indication. If the MIL comes on, go to the PGM-Fl System MIL circuit troubleshooting (see MIL CIRCUIT TROUBLESHOOTING ). |
| 4 | Immobilizer indicator does not go off. | Symptom troubleshooting (see IMMOBILIZER INDICATOR DOES NOT GO OFF ). |
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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.