Q&A

2007 Hummer H2

Question: Check Engine Light

• Check Engine Light Due to Gas Cap Issue
  Illumination of the Check Engine Light can be caused by a loose or worn gas cap.

  Common Problems > Hummer H2

• Check Engine Light Due to Restricted Secondary Air Injection Check Valves
  ...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...

  Common Problems > Hummer H2

• Check Engine Light Due to Gas Cap Issue
  A Loose or worn gas cap may cause Check Engine Light to illuminate.

  Common Problems > Hummer H2

• Check Engine Light Due to Gas Cap Issue
  Illumination of the Check Engine Light can be caused by a loose or worn gas cap.

  Common Problems > Hummer H2

• Check Engine Light Due to Gas Cap Issue
  Illumination of the Check Engine Light can be caused by a loose or worn gas cap.

  Common Problems > Hummer H2