Affected Component: ENGINE AND ENGINE COOLING:ENGINE:GASOLINE

Date Published

JUN 18, 1999

NHTSA TSB #

606167

TSB Document

• Sorry, the NHTSA has not posted this TSB document yet.

You can still get the detailed info from Jeep for this TSB. Call your local Jeep dealer's service department & ask for a copy of TSB# 181599.

Summary

SEVERAL REVISIONS HAVE BEEN MADE TO THE IDLE STRATEGY OF THE 4.7L ENGINE. ONE CHANGE IS TO THE UPSTREAM OXYGEN SENSOR (O2) BIASING / SWITCHING WHEN THE TRANSMISSION IS IN PARK OR NEUTRAL. *TT