Volkswagen Passat 2009–2016 — technical service bulletin
Bulletin Emissions Servic · NHTSA communication 10150786 · issued Jul 27, 2018
Technical service bulletin
communication type
Engine and Engine Cooling
component
2009–2016
model years
11
vehicle entries
Official summary
The reductive agent fluid (AdBlue) could contaminate the temperature sensor, causing the Malfunction Indicator Light (MIL) to come on. Additionally, high heat levels can cause the AdBlue fluid to react with the heating fins, causing a variation in internal resistance and the MIL to come on. If the MIL is on, the vehicle will not pass an emissions inspection.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.