Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
DTC C1275: Pcm Requested TCS To Be Disabled
1998 Buick RivieraSECTION DTC C1275: Pcm Requested TCS To Be Disabled
- Perform diagnostic system check. See DIAGNOSTIC SYSTEM CHECK. After performing diagnostic system check, go to next step.
- Turn ignition to start. Using scan tool, display DTCs. If any ABS/TCS or PCM DTCs are set, go to appropriate DTC for diagnosis. See appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE. If no DTCs are set, go to next step.
- Clear DTCs. Turn ignition off. Turn ignition to start. If DTC C1275 resets, go to step 5) . If DTC C1275 does not reset, go to next step.
- Start vehicle and test drive vehicle greater than 10 MPH. Repeat drive cycle sequence 2 more times. If DTC C1275 set during last 3 drive cycles, go to next step. If DTC C1275 does not reset during last 3 drive cycles, see INTERMITTENTS & POOR CONNECTIONS under DIAGNOSIS & TESTING.
- Perform PCM ON-BOARD DIAGNOSTIC SYSTEM CHECK. See appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE. If on-board diagnostic system check passes, go to next step. If on-board diagnostic system check does not pass, perform suggested repairs in self-diagnostics article.
- Replace EBTCM.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.