JKRockStomper

What does it mean when there is an engine light but no codes?

4WDHARDWARE

Are you running the codes with the on board computer or with an actual OBDII scanner? It could be that the code isn't showing up with the scanner you have. Some scanners aren't capable of running the newer computers in some of the Jeeps. Let me know what scanner you're using and I'll help out!

-Zach

JKRockStomper

Running the onboard computer

Jiblet

Which light? The MIL under the P of PRNDL?

JKRockStomper

The one that looks like an engine

Jiblet

If its flashing, it's more of a problem. If its solid, it's more likely minor. It could turn itself off after a few starts (says the manual).

The onboard code reader doesn't always show every code.

You can have the codes read at any of the chain auto parts stores like autozone or advance. Usually for free.

BlackRockBurner

Long shot- when I forgot my gas cap at the station, my idiot light lit 40 miles later. Just can't remember if it was engine or another light.

r3cluse

Pull the negative lead off the battery, wait a few minutes, then put it back on. If the engine light comes back on then borrow a code scanner.

JKRockStomper

Btt !!!!

Medusae

This worked. In fact, after I tried the on-off routine and removed the key, all the dash lights stayed on. Some capacitor was not discharging, apparently.