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 DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 610 (SUPPLEMENTAL INFLATABLE RESTRAINT SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESDTC 1066-1068CIRCUIT/SYSTEM VERIFICATION
2008 Chevrolet HHR LT, 2.4 P, Automatic
Circuit/System Verification
2008 Chevrolet HHR LT, 2.4 P, AutomaticSECTION Circuit/System Verification
WARNING: This page is about a different car, the 2011 Chevrolet HHR. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
The Passenger Presence Module can set DTC 1066-1068 when the system voltage drops below 8 V.
- Ignition OFF, measure and record the battery voltage at the battery terminals. The battery voltage should stabilize between 12.4 and 12.8 V within a few minutes of turning the ignition OFF.
- If not within the specified range, refer to Battery Inspection/Test .
- Engine running, accessories OFF, measure and record the battery voltage at the battery terminals. The voltage should be at least 1 volt greater than the voltage measured in step 1 but less than 15 V.
- If not within the specified range, refer to circuit/system testing below.
RENDER: 1.0x
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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.