P0171Średni
Zbyt uboga mieszanka — Bank 1
Układ napędowy
Sprawdź szczegóły →P0171B
ŚredniSystem Too Lean — DME (BMW)
OBD-II (EN): Fuel Trim Too Lean - DME (BMW)
Code P0171B — System Too Lean — DME (BMW). Symptoms: jerking. Possible cause: vacuum system leak (common in BMW — DISA rings). Professional diagnosis recommended.
Symptoms
Jerking, lack of power, unstable idle
Possible causes
Vacuum system leak (common in BMW — DISA rings, intake manifold gasket), faulty VANOS sensor, low fuel pressure
Affected systems
Silnik spalinowyUkład paliwowy
Related codes
P0174Średni
Zbyt uboga mieszanka — Bank 2
Układ napędowy
Sprawdź szczegóły →Universal version
This code has a universal OBD-II form:
P0171Zbyt uboga mieszanka — Bank 1Code P0171B appears in these brands
Go to messages and symptoms for your brand — there we analyze this code together with other typical alerts.
Does code P0171B 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.