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OBD FelhlerCode P20A0
Hallo,
mein 320 D (E91) OBD zeigt den FehlerCode P20A0.


Im Internet fand ich folgendes:
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P20a0 Description

In order to reverse the reductant flow direction (for line purge) a 4-2-way valve (reverting valve) needs to be switched. The valve is switched by a solenoid.The reverting valve functional check monitors the pressure drop when the purge cycle is started. To run this test the pressure level must exceed a calibration threshold (280 kPa) at beginning of test. For a successful test result, the pressure must drop by another threshold (230 kPa) within the time.
If the test is not successfully passed the purge cycle will be terminated immediately because of the risk of uncontrolled injection of reductant into the exhaust pipe.

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Also soll das ein Fehler des Einspritzventils im Abgassystem sein.
Mein E91 hat aber gar keinen BlueAd und im Abgassystem wird nichts eingespritzt.
Was soll den dieses "reductant" sein?

Danke für Ihrer Unterstützung