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 MANUALSCHEVROLET2008HHR SS, AUTOMATICREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROLS AND FUEL - 2.0L - DTC P2088 TO DTC P2310DTC P2261CIRCUIT/SYSTEM TESTING
2008 Chevrolet HHR SS, Automatic
Circuit/System Testing
2008 Chevrolet HHR SS, AutomaticSECTION Circuit/System Testing
- Inspect for any vacuum leaks, damage, restrictions, improper routing or connecting of the vacuum hoses on the TC bypass valve solenoid, the TC bypass valve, and the charge air bypass valve vacuum tank.
- Clear the DTC and operate the vehicle within the Conditions for Running the DTC.
- If the DTC cannot be cleared or continues to reset, then replace the turbocharger assembly.
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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.