P006B
MAP - Exhaust Pressure Correlation
The relationship between manifold absolute pressure and exhaust back pressure is implausible. One of the two pressure sensors is faulty or there is a major leak in either path.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Exhaust back-pressure sensor faultyCommon
- DPF or exhaust path leakPossible
Parts involved
- MAP Sensor
- Exhaust Pressure Sensor
P006B is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.