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 LT, 2.4 P, AUTOMATICREPAIR AND DIAGNOSISENGINE MECHANICALSTARTERBATTERY, CHARGING SYSTEM AND STARTING SYSTEMDIAGNOSTIC INFORMATION AND PROCEDURESDTC P0563CIRCUIT/SYSTEM VERIFICATION
2008 Chevrolet HHR LT, 2.4 P, Automatic
Circuit/System Verification
2008 Chevrolet HHR LT, 2.4 P, AutomaticSECTION Circuit/System Verification
- Verify DTC P0563 is set as current.
- If the DTC is history, or if high voltage DTCs are set in multiple modules, refer to Charging System Test .
- Engine running, record the voltage at the battery terminals. Observe the scan tool ECM Ignition 1 Signal parameter. Voltages should not differ by more than 1 volt.
- If greater than the specified value, replace the ECM.
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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.