C0305
Inlet Valve Rear Left Performance
The rear left inlet solenoid valve does not respond hydraulically as expected.
- Check engine light: Not always
- Emissions related: No
- Repair difficulty: hard
Symptoms
- ABS warning light on
- ESC/stability control deactivated
- Possible reduced brake assist
- Speedometer may behave erratically
Common causes
Ordered by how often each turns out to be the cause.
- Valve stuckCommon
- Coil resistance driftPossible
Parts involved
- ABS Solenoid Valve Rl
- ABS Hydraulic Block
C0305 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.