Possible Causes
WARNING: This page is about a different car, the 1999 Buick Regal and 1999 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.
- Requested Torque line (CKT463) open
- Requested Torque line (CKT463) shorted to ground
- Requested Torque line (CKT463) shorted to voltage
- Communication frequency malfunction
- PCM not receiving Class 2 message