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 176 (FUEL SYSTEM & EMISSIONS SYSTEM)GENERAL TROUBLESHOOTING INFORMATIONCKP PATTERN CLEAR/CKP PATTERN LEARNLEARN PROCEDURE (WITHOUT THE HDS)
2008 Chevrolet HHR LT, 2.4 P, Automatic
Learn Procedure (without the HDS)
2008 Chevrolet HHR LT, 2.4 P, AutomaticSECTION Learn Procedure (without the HDS)
WARNING: This page is about a different car, the 2011 Honda Insight and 2010 Honda Insight. However, it is still accessible from the selected car via links, so may be relevant.
- Start the engine. Hold the engine speed at 3,000 rpm without load (in P or N) until the radiator fan comes on.
- Test-drive the vehicle on a level road: Decelerate (with the throttle fully closed) from an engine speed of 2,500 rpm down to 1,000 rpm with the transmission in L.
- Repeat step 2 several times.
- Turn the ignition switch to LOCK (0).
- Turn the ignition switch to ON (II), and wait 30 seconds.
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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.