P006BMAP - Exhaust Pressure Correlation
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- On engines with an exhaust pressure sensor, mostly turbocharged diesels, the control module checks whether manifold pressure and exhaust back pressure fit each other, for example with the engine stopped, when both should be at ambient pressure. P006B is set when they do not. No manufacturer description of this code was found; the explanation follows the general rule for plausibility checks of input sensors. Suspects are the exhaust pressure sensor or its sooted hose, and the manifold pressure sensor. Each sensor can be electrically fine on its own; regulations require such plausibility checks for input sensors with a code of their own.
- What you may notice
- Check engine light on
- Often no further symptoms
- Likely causes
- PossibleExhaust pressure sensor faulty or its hose sooted or blocked
- PossibleManifold pressure sensor faulty
- RareEGR or turbocharger fault distorting pressures
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €50 – €250
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.