FERM and any other Jeep guys......

[THEFERMANATOR]

Yep, like the instuctions SKOOLS posted, it don't work on all of em unfortunately. I know when I was at the dealer it would get frustrating waiting on the DRBIII to read codes, but the key trick didn't work but half the time(if you were lucky).

[C YENSEN]

well i just reconnected the battery after an hour and the light is OFFand it better stay that way

[tsubaki]

I give it less than a week. If you drive it almost every day.

[THEFERMANATOR]

If the light is off after a reset, then start it up. If the light doesn't come on right away then you have a problem in an OBDII monitored area. Many codes will not set until you drive it for 20 minutes at highway speeds.

[C YENSEN]

i figured it will come back on.....hopefully not until I sell it

[C YENSEN]

Will The Check Engine Light Come On If It Is Low On Fluids Such As Transmission, Transfer Case, Power Steering, Brakefluid?

[tsubaki]

Don't think that is the case on Chrysler products. However I do know that Honda will do it. The windshield wider fluid can be low and it will set the light off.

[THEFERMANATOR]

If the tranny was low it could throw a code for slippage. As far as actual fluid level's, that would be a no. Brake fluid though will turn on the brake light in the cluster as the proportioning valve will trip the limit switch if it gets low or air in it. Reading the codes is really your only option to go with. Be careful though of the light when trying to sell it. If it is an OBDII readiness monitor that is throwing it, it will trigger the light after a highway drive. MOST codes will clear themselves after 3 consecutive engine heat cycles without the fault being present. The downstream O2 is famous for driving people nuts with an intermittent check engine light. I don't remember where the ground is at on a 99, but I know they give trouble with the ground for the downstream O2.