P00D0Barometric Pressure - Turbocharger/Supercharger Boost Sensor B Correlation
- 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
- With the engine stopped or without boost, the boost pressure sensor B (between compressor and throttle) must read practically ambient pressure. This code is set when it deviates from the barometric pressure sensor by more than a threshold; the code does not say which of the two is wrong. B denotes the second boost pressure sensor, for example on a second turbocharger. Manufacturers that publish their diagnostics run the same comparison under other codes. None of the published manufacturer documents searched uses this code; the explanation follows regulations and comparable manufacturer monitors.
- What you may notice
- Check engine light on
- Reduced boost or limp mode possible
- Often no further symptoms
- Likely causes
- LikelyBoost pressure sensor dirty, oil-coated or drifting
- PossibleBarometric sensor drifting, also when inside the control module
- PossibleContact resistance at connector, ground or 5 V reference
- PossibleSensor port or hose leaking or blocked
- 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: €40 – €300
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.