P2BADWysoki
Czujnik NOx — sygnał poza zakresem (bank 1) (VAG)
Układ napędowy
Sprawdź szczegóły →P20EEM
WysokiSCR/AdBlue — efficiency below threshold (Mercedes)
OBD-II (EN): SCR/AdBlue Efficiency Below Threshold
Code P20EEM — SCR/AdBlue — efficiency below threshold (Mercedes). Symptoms: adblue warning light. Possible cause: poor quality adblue. Professional diagnosis recommended.
Symptoms
AdBlue warning light, blueefficiency message, km countdown to lockout
Possible causes
Poor quality AdBlue, faulty AdBlue pump, clogged filter, faulty NOx sensor
Affected systems
Silnik spalinowyUkład wydechowySCR/AdBlue
Related codes
Code P20EEM appears in these brands
Go to messages and symptoms for your brand — there we analyze this code together with other typical alerts.
Suggested Hybspec services
Based on the systems affected by this code, we will most likely start with:
Tags and synonyms
Does code P20EEM require professional diagnostics?
The code alone is not enough. To find the cause, you need to read live data, check freeze frame conditions, and compare with vehicle behavior. Book a diagnostic session.