P2201Wysoki
Czujnik NOx — obwód poza zakresem (Mercedes)
Układ napędowy
Sprawdź szczegóły →P2BAF
WysokiSCR Catalyst Efficiency Below Threshold (Mercedes)
OBD-II (EN): SCR Catalyst Efficiency Below Threshold
Code P2BAF — SCR Catalyst Efficiency Below Threshold (Mercedes). Symptoms: AdBlue warning light. Possible cause: poor AdBlue quality. Professional diagnosis recommended.
Symptoms
AdBlue warning light, service message, countdown to power limitation or start lockout
Possible causes
Poor AdBlue quality, faulty AdBlue injector (clogged with crystallization), damaged SCR catalyst, faulty NOx sensor
Affected systems
Silnik spalinowyUkład wydechowySCR/AdBlue
Related codes
P20EEWysoki
Sprawność katalizatora SCR / AdBlue poniżej progu (VAG)
Układ napędowy
Sprawdź szczegóły →Code P2BAF 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:
Does code P2BAF 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.