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 VARIANT/TRIMSECTION 5 (ENGINE CONTROLS - 2.0L - TROUBLESHOOTING & DIAGNOSIS)INSPECTION/MAINTENANCE (I/M) SYSTEM DTC TABLE
2006 Chevrolet Cobalt SS, 4D Sedan, Standard
Inspection/Maintenance (I/M) System DTC Table
2006 Chevrolet Cobalt SS, 4D Sedan, StandardSECTION Inspection/Maintenance (I/M) System DTC Table
WARNING: This page is about a different variant/trim than selected.
Inspection/Maintenance (I/M) System DTC Table
| System | DTCs Required to Set System Status to YES | Inspection/Maintenance (I/M) System Set Procedure |
|---|---|---|
| Catalyst | DTC P0420 | Inspection/Maintenance (I/M) Catalyst System Set Procedure |
| EVAP | DTC P0442 DTC P0446 DTC P0455 DTC P0496 |
Inspection/Maintenance (I/M) Evaporative Emission (EVAP) System Set Procedure |
| Oxygen Sensor | DTC P0133 DTC P0136 DTC P0140 DTC P1133 |
Inspection/Maintenance (I/M) Heated Oxygen Sensor/Oxygen Sensor (HO2S/O2S) System Set Procedure |
| Oxygen Sensor Heater | DTC P0135 DTC P0141 |
Inspection/Maintenance (I/M) Heated Oxygen Sensor (HO2S) Heater System Set Procedure |
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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.