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Service bulletin B120916

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10151253
Published by NHTSA2018-12-10
Manufacturer's numberB120916
Manufacturer's date2016-04-01
NHTSA componentENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR

NHTSA's summary

N20 - The Service Engine Soon Light is On with DME Fault 118602 Stored. The Service Engine Soon light is on (MIL) with only the following oxygen sensor fault stored. 118602 - Oxygen sensor before catalytic converter, fine mixture control: exhaust gas after catalytic converter too lean CAUSE An actual engine related problem and/or DME software diagnostic

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Engine, Exhaust and emissions, Catalytic converter

Vehicles listed
BMW 228I2014, 2015, 2016
BMW 230I2017, 2018
BMW 320I2013, 2014, 2015, 2016, 2017
BMW 328D2014, 2015, 2016, 2017
BMW 328I2012, 2013, 2014, 2015, 2016
BMW 330E2016, 2017
BMW 330I2017
BMW 335I2012, 2013, 2014, 2015, 2016
BMW 340I2016, 2017
BMW 428I2014, 2015, 2016
BMW 430I2017, 2018
BMW 435I2014, 2015, 2016
BMW 440I2017, 2018
BMW 5-SERIES GRAN TURISMO2017
BMW 528I2013, 2014, 2015, 2016
BMW ACTIVE HYBRID 32013
BMW ACTIVE HYBRID 32014, 2015
BMW M235I2014, 2015, 2016
BMW M240I2017, 2018
BMW X32011, 2012, 2013, 2014, 2015, 2016, 2017
BMW X42015, 2016, 2017

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
B1227182019-11-18. Service bulletin. SERVICE ACTION: PROGRAM THE CONTROL UNIT (DME): If a Valvetronic fault occurs, the catalytic converter heating intensity may be reduced. This situation will not generate a customer complaint.
B1223192019-08-19. Service bulletin. DIAGNOSTIC HINT: CATALYTIC CONVERTER INSPECTION AFTER LOSS OF CRANKSHAFT SIGNAL. In certain situations when the crankshaft position signal is lost while driving the malfunction indicator lamp (MIL) and an engine malfunction check control message (CCM #29) may be displayed. The engine may run roughly or with reduced power.
1221132018-12-03. Service bulletin. Service Action: Program Control Units (Direct Ozone Reduction). The DME diagnostic for direct ozone reduction, by means of the environmental air catalyst sensor (EAC) located in the radiator, is not carried out correctly as required by emissions regulations.