A Loose or worn gas cap may cause Check Engine Light to illuminate.Google+
Car Problem Reports
Chevrolet HHR Check Engine Light Due to Gas Cap Issue
Chevrolet HHR Problem
Average Mileage: 83,547 mi (48,500 mi - 180,000 mi)
Visitor, 2006 Chevrolet HHR, 72,354 mi
check engine light comes on for a couple days then goes out for a couple days
i have change out the camshaft sensor and still my engine like still come on, where is the crankshaft sensor located on my engine....please help me....i check my gas cap and make sure it is on tight.
Visitor, 2006 Chevrolet HHR, 80,000 mi
Replaced gas cap stayed off for 1 week then came back on.
I have a engine on and they are taking about a new engine
Visitor, 2009 Chevrolet HHR, 48,500 mi
2009 HHR. At 48500 miles, the check engine light is on. I changed the spark plugs and coil caps. Light stayed out for few hundred miles but now back on.
Visitor, 2008 Chevrolet HHR, 48,650 mi
Same issue - replaced gas cap and all is still well at 52418
Visitor, 2007 Chevrolet HHR, 49,000 mi
Check engine light comes on replaced gas cap went out for quit awhile but now it is one again. Dealership said there is a bulletin out. Car runs fine and there is no performance loss. One dealership wants to clean injectors for $240 but i really don't think thats the problem Any Ideas???? Karl