Some customers may experience a squeaking noise may be heard from the exhaust manifold when the idle speed...

Bulletin number

01-010-22

Component

Power train

Summary

Some customers may experience a squeaking noise may be heard from the exhaust manifold when the idle speed drops from fast idle to normal idle speed during cold start. This is caused by a variable valve being stuck in the closed position. When returning from fast idle to normal, the stuck valve suddenly opens due to thermal change around it which causes abnormal noise. To eliminate this concern, the internal design of the exhaust manifold has been modified.

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