U11BC
Lost Brake Switch Message
U11BC is an OBD-II diagnostic trouble code meaning: Lost Brake Switch Message. Common causes: faulty brake switch, open or short circuit in the circuit. Estimated repair cost: $6–28.
Symptoms
- Brake lights don't work
- Problems with cruise control
- Errors in ABS/ESP systems
- Difficulty starting the engine (if the switch affects the start lock)
- Dashboard warning light
Causes
- Faulty brake switch
- Open or short circuit in the circuit
- Poor contact in the connector
- Relay problems
- Control module malfunction
How to Fix
- Check the operation of the brake switch
- Inspect wiring and connectors for damage
- Check fuses and relays
- Scan other related systems for errors
- Replace the brake switch if necessary
Related codes
FAQ
What does the U11BC code mean?
U11BC is an OBD-II diagnostic trouble code that indicates: Lost Brake Switch Message
What causes a U11BC error code?
The most common causes of U11BC include: Faulty brake switch; Open or short circuit in the circuit; Poor contact in the connector; Relay problems.
How do I fix a U11BC diagnostic trouble code?
To fix U11BC: Check the operation of the brake switch. Inspect wiring and connectors for damage. Check fuses and relays. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U11BC?
Do not drive — repair immediately
How much does it cost to fix U11BC?
The estimated repair cost for U11BC is $6–28. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat