Code result
P25C5
Brake Booster Temperature Sensor A Circuit Range/Performance
Moderate severity
What it means
The booster temperature sensor reading is implausible relative to commanded assist or coolant temperature. The signal moves too slowly, sticks, or never reaches expected values during operation.
Is it safe to drive?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
Sensor drift or contamination on the temperature element
mediumA plausible cause — test and verify before replacing parts.
Sensor not seated properly against the booster motor housing
mediumA plausible cause — test and verify before replacing parts.
Sensor element aged beyond calibration window
lowLess common, but worth ruling out after the more likely causes.
Related help
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