This Preliminary Information communication advises the technician that the When the engine is cold, a...

Bulletin number

PIP4176A

Component

Engine and engine cooling

Summary

This Preliminary Information communication advises the technician that the When the engine is cold, a light rattle noise may be heard from under the hood at 1,100 - 1,200 RPM. This noise is a result of normal drive belt and tensioner resonance that may be amplified on a cold engine. As a result, this noise will be isolated to the drive belt tensioner area. This noise is most noticeable on a cold engine and typically, is not noticeable on a warm engine. If this concern is experienced, it is currently considered a normal operating characteristic of the hybrid drive belt tensioner system and system loads from the hybrid starter/generator, and no repairs should be performed.

Owners of these vehicles have filed 74 complaints in the engine category.