DTC Descriptors
WARNING: This page is about a different car, the 2007 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.
This diagnostic procedure supports the following DTCs:
- DTC P1134 HO2S Transition Time Ratio Bank 1 Sensor 1
- DTC P1154 HO2S Transition Time Ratio Bank 2 Sensor 1