Circuit/System Verification
- Verify that DTC B3445 or B3878 is not set.
- If DTC is set, refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- Verify that DTC P0571 is not set.
- If DTC is set, replace the K20 ECM. Clear the DTC and road test the vehicle. If DTC resets, replace the K9 BCM.