P00FB code meaning
Turbocharger Outlet Pressure Sensor A Circuit High
Powertrain system Generic code P00xx codes Check engine light
What P00FB means
The turbocharger outlet pressure sensor A measures the pressure directly after the compressor, usually ahead of the charge air cooler; FCA fits it as a combined temperature and pressure sensor. Boost control and compressor protection use the value. P00FB means the signal voltage is above its valid range: typically a signal wire shorted to the 5 V reference or battery voltage, an open ground, or a failed sensor. It does not mean the boost really is too high – that would be P0234. The circuit is monitored continuously from key-on; comparable GM pressure sensors fail above 86–97 % of the reference for about 4 s. The engine then works with a substitute value and may limit boost. GM and Ford do not use this code family in their published summaries – they rely on the boost sensor ahead of the throttle (P0235–P0238) – so no manufacturer document naming exactly this code was found.
P00FB at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyEasy, DIY possible
- Typical labor0.3 to 1 hours
- Clears after repairAfter a drive cycle
Symptoms of P00FB
- Check engine light on
- Loss of power or limp mode with boost limit
- Further pressure plausibility codes possible
Common causes of P00FB
- Most likelySignal wire shorted to 5 V reference or battery voltage
- PossibleGround (low reference) wire open or connector corroded
- PossibleSensor faulty internally (oil mist, heat at compressor outlet)
- Less likelyEngine control module faulty
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Turbocharger outlet pressure sensor aSensor wiringSensor reference voltage
What each part of P00FB means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 0 | Area: fuel and air metering and auxiliary emission controls. |
| FB | The exact fault in that area. |
What to do next
- Note P00FB 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 P00FB
What does P00FB mean?
P00FB means "Turbocharger Outlet Pressure Sensor A Circuit High". The turbocharger outlet pressure sensor A measures the pressure directly after the compressor, usually ahead of the charge air cooler; FCA fits it as a combined temperature and pressure sensor. It is a generic code, so it means the same on every make.
Is it safe to drive with P00FB?
Drive gently and only to a workshop. With P00FB the car can go into limp mode (reduced power) to protect itself.
Will P00FB fail an emissions test?
Yes, it can. P00FB 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 P00FB to fix?
Difficulty: easy. A typical repair takes 0.3 to 1 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P00FB clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.