OBD-II code · Powertrain (generic)
P01FF Turbocharger Outlet Pressure Sensor A/B Correlation
Turbocharger outlet pressure sensors A and B disagree beyond plausible deviation. Boost control tracks commanded vs. actual manifold pressure; persistent deviation means wastegate, vanes, hose or actuator are not delivering the requested pressure.
Is it safe to drive with P01FF?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyOne sensor drifted
Symptoms
- Check engine light on
- Significant power loss / limp mode
- Possible blue or black smoke from exhaust
- Whistling or hissing sound from intake
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–2 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Turbo Outlet Pressure Sensor A, Turbo Outlet Pressure Sensor B
Related codes
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.