Circuit/System Verification
WARNING: This page is about a different car, the 2008 Chevrolet Malibu Classic. However, it is still accessible from the selected car via links, so may be relevant.
Verify DTC C0121 is not set.
- If the DTC is set, clear the DTC and operate the vehicle within the Conditions for Running the DTC. If the DTC resets, replace the EBCM.