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 LS, AUTOMATICREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROLS AND FUEL - 2.2L (L61) - DTC P0442 TO DTC P2544DTC P0442CIRCUIT/SYSTEM TESTING
2008 Chevrolet HHR LS, Automatic
Circuit/System Testing
2008 Chevrolet HHR LS, AutomaticSECTION Circuit/System Testing
IMPORTANT:
- Larger volume fuel tanks and/or those with lower fuel levels may require several minutes for the floating indicator to stabilize.
- Refer to the J 41413-200 operation manual for detailed instructions in Evaporative Emission System Diagnosis
- Using the GE-41415-50 , connect the J 41413-200 to the vehicle filler neck. For vehicles without a service port, disconnect the purge tube at the quick connector on the EVAP canister side of the EVAP canister purge solenoid valve and install the CH-48096 . See Special Tools .
- Seal the system and use the flow meter on the J 41413-200
, calibrated to 0.51 mm (0.020 in) to determine that there is no leak in the EVAP system.
- If a leak is detected use the J 41413-200 to apply smoke to the EVAP system at the service port or the filler neck until the leak is located. For vehicles without a service port, disconnect the purge tube at the quick connector on the EVAP canister side of the purge solenoid valve and install the CH-48096 . See Special Tools .
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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.