Code result
P25F4
Turbocharger/Supercharger Boost Sensor C Circuit Low
Moderate severity
What it means
The third boost pressure sensor signal is below the lower diagnostic threshold. Usually a shorted sensor element or a short to ground.
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
Internal short in the sensor element
highOne of the most commonly reported causes for this code — check this first.
Signal wire shorted to ground
mediumA plausible cause — test and verify before replacing parts.
Connector pins corroded - high contact resistance
lowLess common, but worth ruling out after the more likely causes.
Related help
Get the full diagnosis
Add your vehicle and see step-by-step repair help, recalls, and TSBs in Wrenchify.
Diagnose P25F4 freeNo credit card required