Chassis
generic / SAE
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.
SystemChassis
Typegeneric / SAE
GroupP2
Range / number5 / C8
Possible causes
- Sensor connector not fully seated or pin tension lost high
- Harness chafed against booster housing or pedal bracket medium
- Connector with intermittent contact under vibration low
Symptoms
- Check engine light on
- Significant power loss / limp mode
- Possible blue or black smoke from exhaust
- Whistling or hissing sound from intake
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 80–400 €
- Estimated time: 0.5–2 h
- Component: electric brake booster
- Component: temperature sensor
- Component: wiring harness
- MIL / check engine light
Sources
References
sae:J2012