OBD-II code · Chassis
C0309 Outlet Valve Rear Right Performance
The rear right outlet solenoid valve does not respond hydraulically as expected.
Is it safe to drive with C0309?
Usually safe for short trips, but don’t ignore it: the underlying fault can get more expensive over time.
Common causes
- Most likelyValve stuck
- PossibleCoil resistance drift
Symptoms
- ABS warning light on
- ESC/stability control deactivated
- Possible reduced brake assist
- Speedometer may behave erratically
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 2–5 h
- Emissions test
- Usually unaffected
- Parts involved
- ABS Solenoid Valve Rr, ABS Hydraulic Block
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.