This bulletin provides a procedure to address customer concerns of a high-pitched "chirp", "squeak" or...

Bulletin number

09-54-12R

Component

Engine and engine cooling

Summary

This bulletin provides a procedure to address customer concerns of a high-pitched "chirp", "squeak" or "cricket" sound heard coming from the engine's Direct Injection (DI) high-pressure fuel pump. Not all DI pumps may exhibit this sound. Some vehicles may have components which in combination with certain fuel temperatures and / or formulations, may result in aeration of the fuel within the body of the pump and cause this sound. This result is non-detrimental to the vehicle. Production changes have been made to eliminate the source of the sound. IMPORTANT: A "clack" or mechanical "ticking" sound also made by operation of the highpressure fuel pump is considered to be a normal operating characteristic and no attempt should be made to repair it.

Owners of these vehicles have filed 56 complaints in the engine category.