What does code C0304 mean?

Q: What does code C0304 mean?

Outlet Valve Front Right Performance. C0304 indicates that the antilock braking system (ABS) control module has detected a performance fault with the front right outlet valve, which is the solenoid valve that releases hydraulic pressure from that wheel's brake circuit during antilock operation. The module monitors valve response and circuit integrity, and it sets this code when the valve does not react as expected during a self-test or active ABS event.

DTC codes / C03xx · Brakes, steering and suspension / C0304

C0304Outlet Valve Front Right Performance

C0304 indicates that the antilock braking system (ABS) control module has detected a performance fault with the front right outlet valve, which is the solenoid valve that releases hydraulic pressure from that wheel's brake circuit during antilock operation. The module monitors valve response and circuit integrity, and it sets this code when the valve does not react as expected during a self-test or active ABS event.

SystemChassis

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyProfessional

AreaBrakes, steering and suspension

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.