One problem related to engine shut off without warning has been reported for the 2007 Chevrolet HHR. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2007 Chevrolet HHR based on all problems reported for the 2007 HHR.
While driving on a wet road at 30 to 35 miles per hour. The car shuts off when I topped a small hill and I lost all power. No place to pull off the road. I placed the car in park and turn the key to off and restarted. The engine light came on and the message displayed was engine power reduction. I drove 20 to 25 miles per hour to my destination the car would only go 30 miles per hour and the car shifted roughly and jumped. A nice guy there, turned the key to the on position 3 times before the engine light would go off. Called dealership and they said bring it in, I already had the recall letter and ask him if it could be related to the recall (as I am on a fixed income) he said no and it would cost 150. 00 I have not had any other episodes and I hope I don't it was very scary. Glad I was going slow and not a busy road. I had previously removed the key fob and was only using my ignition key as per the recall letter instruction. Waiting for the next letter for the recall and hope the fix prevents it from happening again.