Yesterday the CEL came on. On the way to a parts store to have the DTC read, the light went out. They did a scan and found no codes. This morning the CEL was on again and I had two parts stores do scans. Both found no DTCs. The overhead monitor shows "Perform Service". Do I need to have a dealer reset the CEL? I need to drive about 250 miles today. Any worries about driving with the CEL on and no codes stored?

What is the mileage and what type of jeep is it actually? Also if the EVIC is saying perform service it is probably time for and oil change and a few other things. But the CEL going on and off sounds like and electical Germlin.

_________________
My CRD Build Thread
Soon to Come:more lights

Dreaded CEL lite- never however had it on that it did'nt throw a code.
Darn CEL on CRD is always going on but it tells of a situation or problem needing fixing...
When my wife gets in the truck she always asks "Is the board clear?"
Last CEL was # 4 glow plug going bad... about a month ago.

I would say to drive it but "perform service" needs to be addressed (oil change and other interval maintainence needed)

anyway FWIW...

roland

_________________
2006 CRD LTD 2.8L VM Motori turbo,CAC, 100K-new timing belt
ORM-SEGR, Trans cooler, CLIII hitch front/rear, Journey HD controller
Mopar skids,"Stone Soup" rails, KK clevis fork 1" mild lift w/Daystar stops
215x85 LRD BFG Commercial A/T's, Rola Rack, V6 airbox, Fumoto valve
10K winch, B5 Biodiesel (ULSD CP3 lube)
Its a Diesel baby!

Well, after driving a few miles the CEL turned off and stayed off for the 250 miles home.
It's a 06 Liberty, 32K miles. I've performed all the maintenance tasks myself. One theory is that this might have been caused by driving through some high water on the road. After a spell of dry roads the engine heat drove off the moisture that was causing the CEL. The EVIC has seems to have been reset so that the next service is due in 12,500 miles.

You control the EVIC and what interval it is reset (the manual shows you how). And i would also check the map sensor they tend to get clogged if you dont have the elephant hose mod. And how high was this water and i am assuming that you drive a CRD?

_________________
My CRD Build Thread
Soon to Come:more lights

It's a CRD. The sensor was cleaned less than 1K miles ago. This was not crossing a stream, just driving through a stretch where a ditch overflowed the highway a couple of inches. Unfortunately a couple of road workers got sprayed. Not nearly as bad as the spray they got from the Land Yacht following me.

Parts places only can scan active codes,you need a high end scanner to that can read history codes and fault logs.Prices of those scanners start at about $3500 before software.

The CEL has returned intermittently. My cheapo Harbor Freight scanner is apparently more compatible with the CRD than the scanners used by the two auto parts stores I went to. The HF scanner shows a 401 code from time to time. The air filter isn't clogged, and the CAC hoses, which are wrapped with silicone tape, seem to be intact. Probably will need to replace the EGR valve. Moparpartsamerica wants about $75 more than the EBAY dealers for an EGR valve.

i have had every scanner i think there is on my truck and none will pull any thing but the cel was on so i had to take it to jeep and they pulled up codes but u probably need to go to jeep to find out what they are!

_________________
05 crd, old man emu, jeepin by al upper control arms, spider track wheel spacers, bf mud terrain t/a, full 3'' with a magnaflow exhaust,rocky road super sliders,skid row gas tank cover,surco roof rack with hella 500 lights,front hooks,b&m trans cooler!

Did the they charge you $100 or so for reading the codes?

Well were I bought my jeep from has the right jeep scan tool and they only charged 70 the first 3 times (all for different stuff ) and now we are all good friends and they don't charge me any more Hahaha

_________________
05 crd, old man emu, jeepin by al upper control arms, spider track wheel spacers, bf mud terrain t/a, full 3'' with a magnaflow exhaust,rocky road super sliders,skid row gas tank cover,surco roof rack with hella 500 lights,front hooks,b&m trans cooler!