U120C
Lost Brake Booster Signal
U120C is an OBD-II diagnostic trouble code meaning: Lost Brake Booster Signal. Common causes: open or short circuit in the brake booster sensor circuit, brake booster sensor malfunction. Estimated repair cost: $33–167.
Symptoms
- Increased brake pedal force
- Check Engine Light Is On
- Reduced braking performance
- There may be other errors related to the brake system
Causes
- Open or short circuit in the brake booster sensor circuit
- Brake booster sensor malfunction
- Problems with the brake control module
- Poor contact in connectors
- Wiring harness damage
How to Fix
- Check the continuity of the brake booster sensor circuit
- Check the condition of connectors and contacts
- Test the brake booster sensor
- Check the brake control module
- If necessary, replace the sensor or repair the wiring
Related codes
FAQ
What does the U120C code mean?
U120C is an OBD-II diagnostic trouble code that indicates: Lost Brake Booster Signal
What causes a U120C error code?
The most common causes of U120C include: Open or short circuit in the brake booster sensor circuit; Brake booster sensor malfunction; Problems with the brake control module; Poor contact in connectors.
How do I fix a U120C diagnostic trouble code?
To fix U120C: Check the continuity of the brake booster sensor circuit. Check the condition of connectors and contacts. Test the brake booster sensor. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U120C?
Limited driving only, diagnose soon
How much does it cost to fix U120C?
The estimated repair cost for U120C is $33–167. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat