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.
Clearing Diagnostic Trouble Codes (DTCS)
1998 Buick RivieraSECTION Clearing Diagnostic Trouble Codes (DTCS)
NOTE:
DTCs cannot be cleared by disconnecting EBCM/EBTCM or negative battery cable, or by turning ignition off. DTCs will be automatically erased when ignition is cycled 100 times without fault reappearing. Ignition cycle counter in EBCM/EBTCM will then be reset to zero.
- Connect Tech 1 scan tool. See USING TECH 1 SCAN TOOL. Before clearing DTCs, check and note current DTC data. Select ABS/TCS function. Select DTC function and then CLEAR CODES function.
- Verify DTCs are cleared. If other DTCs are displayed, either DTCs were not cleared or ABS/TCS fault still exists. Diagnose fault and repeat procedure.
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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.