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 338 (INSTRUMENT PANEL SYSTEM DISPLAYS, GAUGES AND CONSOLE)DIAGNOSTIC INFORMATION AND PROCEDURESDTC P0608CIRCUIT/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 2006 Chevrolet Monte Carlo and 2006 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.
- Install a scan tool.
- Raise the vehicles drive wheels.
- Start the engine.
- Place the transmission into drive.
- With the scan tool, observe the Vehicle Speed Sensor (VSS) parameter in the ECM Engine Data list.
- If the vehicle speed sensor parameter matches the speedometer display, check for a poor connection at the harness connector of the ECM/PCM.
- Turn OFF the ignition.
- Disconnect the ECM/PCM connector C000.
- With the ignition ON, measure the voltage from the vehicle speed signal circuit to a good ground.
- If the voltage measured is more than 9 V, test the vehicle speed signal circuit for a short to battery voltage.
- If the vehicle speed circuit tests normal, replace the ECM/PCM.
- If the voltage measured is less than 9 V, test the vehicle speed signal circuit for an open, a high resistance or for a short to ground.
- If the circuit teats normal, replace the IPC.
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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.