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.
DTC C1238 can set normally during extremely aggressive driving conditions. Always inquire about recent driving condition or driving habits whenever this code is set. Code may set under the following conditions:
- Excessive brake use
- Excessive TCS use