OBD-II code · Powertrain (generic, extended)
P25C8 Brake Booster Temperature Sensor A Circuit Intermittent/Erratic
The booster temperature signal jumps or drops out for short moments. Usually a loose connector or a chafed wire that opens during vibration or thermal expansion.
Is it safe to drive with P25C8?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySensor connector not fully seated or pin tension lost
- PossibleHarness chafed against booster housing or pedal bracket
- Less likelyConnector with intermittent contact under vibration
Symptoms
- Check engine light on
- Significant power loss / limp mode
- Possible blue or black smoke from exhaust
- Whistling or hissing sound from intake
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.5–2 h
- Emissions test
- Usually unaffected
- Parts involved
- Electric Brake Booster, Temperature Sensor, Wiring Harness
Related codes
- C05B7Brake Booster Temperature Sensor C Circuit Intermittent/Erratic
- P25C5Brake Booster Temperature Sensor A Circuit Range/Performance
- P25C6Brake Booster Temperature Sensor A Circuit Low
- P25C7Brake Booster Temperature Sensor A Circuit High
- P25C9Brake System Control Module B Requested MIL Illumination
- P25CAIntake Camshaft Actuator Park Lock Control Circuit / Open Bank 1
- P25CBIntake Camshaft Actuator Park Lock Control Circuit Low Bank 1
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.