P00F9Turbocharger Outlet Pressure Sensor A Range/Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- The turbocharger outlet pressure sensor A measures the pressure directly at the compressor outlet. It is a separate code family from the boost pressure sensor, which usually measures the pressure just ahead of the throttle; engines use it where the pressure behind the compressor is needed in addition, for example to judge the pressure loss across the charge air cooler or to protect against compressor surge. One manufacturer documents it as a combined temperature and pressure sensor. P00F9 means the signal is electrically valid but implausible. In a documented case the cause was a sensor not seated properly and a connector not fully engaged; securing them solved it without parts.
- What you may notice
- Check engine light on
- Loss of power or limp mode with boost limitation
- Jerking under load possible
- Likely causes
- LikelyConnector loose or not fully engaged, or sensor not seated properly
- PossibleSensor oil-coated from turbocharger oil mist or characteristic drifted
- PossibleLeak at the sensor flange or seal
- RareEngine control module faulty
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Easy · Often possible to do yourself.Typical cost: €0 – €250
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.