Check Engine Light Due to Gas Cap Issue on Chevrolet HHR SS

Problem Description and Possible Solution

A Loose or worn gas cap may cause Check Engine Light to illuminate.

Problem Data
RepairPal Verified
Average mileage: 74,564 (30,000–100,000)
3 model years affected: 2008, 2009, 2010
14 people reported this problem
Viewing 1 - 5 of 5 comments
Check engine light comes on/off intermittently. Have installed 3 new gas caps, which helps for a week or so. It seems to stay off when the tank is full, but comes back on at 3/4 of a tank. Using high grade fuel. No resolution found.
Car drives great , but went to my bank. When I started it up . Check engine light came on . And won't go off