Chassis
generic / SAE
P25C4
Brake Booster Temperature Sensor A Circuit
The temperature sensor monitoring the electric brake booster (iBooster, eBooster) returns no usable signal. Without temperature feedback the controller derates booster assist to protect the motor.
SystemChassis
Typegeneric / SAE
GroupP2
Range / number5 / C4
Possible causes
- Open sensor element or broken sensor wire high
- Corroded connector on the booster sensor pigtail medium
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: hard
- DIY: shop recommended
- Estimated cost: 200–1500 €
- Estimated time: 1–4 h
- Component: electric brake booster
- Component: temperature sensor
- Component: wiring harness
- MIL / check engine light
Sources
References
sae:J2012