"Situation: while driving in wet weather conditions, condensation may build up within the engine charge...

Bulletin number

Q255NAS1

Component

Engine and engine cooling: cooling system

Summary

"situation: while driving in wet weather conditions, condensation may build up within the engine charge air cooler. 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 the instrument cluster message center and the engine malfunction indicator lamp may illuminate. New components have been designed to limit condensation from building in the engine’s charge air cooler to prevent the restricted performance mode from initiating. Additionally, updated engine control module (ECM) software has been developed which changes the thresholds necessary to initiate the restricted performance mode for this issue."

Owners of these vehicles have filed 21 complaints in the engine category.