My 98 Jeep Cherokee Sport stays at high idle whenstopping

Generic code reader will only read codes of faults that will or could affect exhaust emissions though many inexpensive code readers will usefully also allow the viewing of live data.
Sometimes knowing what a fault isn't is quite useful...

I heard from a colleague that Jeep electronics aren't easy to read and dealer level diagnostic equipment is sometimes necessary.

Transmission sticks in reverse- won't go into park. - JeepsUnlimited

www.jeepsunlimited.com/forums/showthread.php?...won-t-go-into-park
Jun 14, 2013 - 12 posts - ‎5 authors 2003 6 cyl 4x4 Grand Cherokee Laredo automatic- Occaionally, when shifting from REVERSE TO PARK, my Jeep will stay in reverse. Typically its ... '2001 WJ'4,0L'42RE'NV 242'380000 km'ECE Compliant' ??????????? ??? ...

2001 jeep grand Cherokee laredo - CarGurus

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CarGurusJan 27, 2014 - 2001 jeep grand Cherokee laredo - Just purchased a 2001 Jeep GrandCherokee Laredo and ... It starts in PARK sometimes and sometimes it won't and I have to start it in Neutral. ... Hatch shuts flush, but won't stay shut. help!

older post 1month
you failed to say what tires are touching, dry pavement or ice/snow or off road...... MATTERS big time.......!

the operators guide tells you not to do that.
the rules for 4Hi and low are different. RTM? yet?
last year ZJ
Quadra-Trac(tm) NV242 box. it is. full and part time box.
what does it (oper guide)tell you.
stay out of part time on dry roads. (clear?)
rule 2, save rule for Low Range.
low range is not full time 4wd.
if you fail to believe it , it will wind up and go crunch

here is the direct quote.... see last line,,, its 100% real.


i you had the NV231 box, all gears are Part time, all 4wd gears stay off dry pavement.

You could possibly have a bad EGR valve which would affect the vacuum which affects the idle. Check for a vacuum leak first then check the egr valve

lube-oil the peddle and cable-do both ends of the cable-check the return spring -it may be weak-you may want to replace it-cheers Denny

No where, it is a vent hose. Put it up high so that it can stay clean.

That error code is idle control system malfunction.  You need to replace your idle air controller (IAC). IAC basically opens and closes the throttle at idle so it stays at constants RPM.  Hope this helps.  Thanks for an honest rating and for using FixYa.

check fuses in power distribution center near battery and auto shutdown relay

i had the same problem with my 2001 Cherokee Sport i replaced the battery and now it runs fine.