2007 Hummer H2 Q&A
2007 Hummer H2 Question: Check Engine Light
Check engine light came on after truck misfired and stalled after fueling. - Visitor
First thing to do is retrieve the trouble code(s) stored in the vehicle's computer. - fernando
...tion check valves may become restricted causing poor air flow resulting in illumination of the Check Engine Light. It is often recommend to replace both check valves even if a fault code is set for only one...
A Loose or worn gas cap may cause Check Engine Light to illuminate.