Land Rover Range Rover Evoque 2012–2013 — technical service bulletin
Bulletin Q255NAS4 · NHTSA communication 10105446 · issued Apr 8, 2015
Technical service bulletin
communication type
Engine and Engine Cooling
component
2012–2013
model years
2
vehicle entries
Official summary
"situation: while driving in wet weather conditions, condensation may build up within the engine charge air radiator. Following a rapid increase in engine speed, this condensation could be drawn in to one of the engine s cylinders, causing the engine management system to sense a misfire. The engine is programmed to react to this misfire by initiating a restricted performance mode to protect the exhaust catalyst. In this mode, the driver noticeably experiences reduced power to accelerate until the engine is switched off and then restarted. Furthermore, an engine warning message will display in
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.