// Official meaning
Solenoid valve fault — one or more of the solenoid valves inside the SBC unit have failed.
// On the bench
The SBC unit meters brake pressure through internal solenoid valves, and when one sticks or fails electrically this code is stored. Part of the C235x family we have repaired for years — it means the unit comes off and gets properly rebuilt.
How it shows up
- SBC warning message on the dash
- Code returns after clearing
- May appear alongside other C235x codes
What fixing it involves
Three honest routes, all through our dedicated SBC workshop at sbc-repair.com: a counter reset (£120 — nothing replaced, only right if the pump tests healthy), a full rebuild of your own unit (£430, 6-month warranty), or an exchange pump (£700, 12-month warranty, no core return). Complete on-car service — repair, reprogram, bleed and initialise — from £650.
Frequently asked questions
Can a solenoid valve fault be reset?
No — a failed valve is a physical fault inside the unit. The £120 counter reset is only for the C249F service counter; C235D needs a rebuild or an exchange pump.
Do I have to bring the car to you?
No. Most C235x jobs are done by post on the unit alone, or we do the complete on-car service from £650 — repair, reprogram, bleed and initialise. We can also assist your own mechanic with refitting and bleeding.