P025F code meaning
Turbocharger/Supercharger Boost Sensor B Intermittent/Erratic
Powertrain system Generic code P02xx codes Check engine light
What P025F means
Boost sensor B is a second boost pressure sensor, for a second turbo or bank on twin-turbo engines or a second stage. P025F counts brief excursions of its signal outside the valid range that are too short for the low or high code – the counterpart of P025E, which Ford sets after 10 such events in one drive cycle. No manufacturer using sensor B codes was found; the description follows CARB's input monitoring requirement and Ford's sensor A check.
P025F at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyEasy, DIY possible
- Typical labor0.3 to 1.5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P025F
- Check engine light on
- Occasional loss of power
- Boost limited
Common causes of P025F
- Most likelyLoose contact or corrosion at the sensor B connector
- PossibleWire breaking from vibration or heat
- PossibleSensor B faulty
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Boost pressure sensor bSensor wiring
What each part of P025F means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 2 | Area: fuel and air metering (injector circuit). |
| 5F | The exact fault in that area. |
What to do next
- Note P025F and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P025F
What does P025F mean?
P025F means "Turbocharger/Supercharger Boost Sensor B Intermittent/Erratic". Boost sensor B is a second boost pressure sensor, for a second turbo or bank on twin-turbo engines or a second stage. It is a generic code, so it means the same on every make.
Is it safe to drive with P025F?
Drive gently and only to a workshop. With P025F the car can go into limp mode (reduced power) to protect itself.
Will P025F fail an emissions test?
Yes, it can. P025F is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P025F to fix?
Difficulty: easy. A typical repair takes 0.3 to 1.5 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P025F clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.