Affected Component: EQUIPMENT ADAPTIVE/MOBILITY

Date Published
NOV 04, 2020
NHTSA TSB #
10183589
TSB Document
Summary
Some vehicle may exhibit a tapping noise from the engine during idling; etc., and synchronized to the engine rpm. The tapping noise may be caused by the switchable hydraulic lash adjuster (HLA), which may not work properly due to air bubbles accumulated in the oil passage in it.