Excessive Dump/Isolation Time
Table of contents
C0274 BUICK Possible Causes
- Faulty Brake Pressure Modulator Valve (BPMV)
- Brake Pressure Modulator Valve (BPMV) harness is open or shorted
- Brake Pressure Modulator Valve (BPMV) circuit poor electrical connection
How do I fix code C0274 BUICK?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Tech Notes
- If the C0274 code is combined with other codes, fix other codes first.
Cost of diagnosing the C0274 BUICK code
The cost of diagnosing the C0274 BUICK code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Anti-Lock Brake System (ABS) Warning Light ON
- Engine Light ON (or Service Engine Soon Warning Light)
C0274 BUICK Description
The Electronic Brake Control Module (EBCM) microprocessor grounds the isolation coil to energize and close the isolation valve. This will prevent any additional brake pressure applied by the driver from reaching the wheel. Further increases in brake pressure will be prohibited. Each isolation valve is closed independently to isolate each wheel. The EBCM microprocessor also uses software subroutine to monitor for any ABS event which would initiate an isolation command. This subroutine is performed every 1.0 second.
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