I got "check engine" light coming on now. I did the on/off test and the error code came up as "P 1494". Anyone know what this is? Thanks.

I got "check engine" light coming on now. I did the on/off test and the error code came up as "P 1494". Anyone know what this is? Thanks.
HI THE CODE P1494 IS LEAKAGE DETECTING PUMP PRESSURE SWITCH DON'T KNOW WHAT IT REFERS TO, DALE
jeepman600@aol.com :banghead:

Do you think it is a serious problem? A possible easy, chaep fix?

Do you think it is a serious problem? A possible easy, chaep fix?HI, IF YOU COULD FIND WHAT SWITCH OR THE AREA AFFECTED YOU WOULD HAVE A BETTER IDEA, I DON'T HAVE THE ANSWER TO THAT. DALE jeepman600@aol.com :banghead:

Where is the Leak Detedtion Pump located?

Check these out see if helps you any.

GC codes:
http://www.wanderingtrail.com/RubiMechanical/grand_cherokee_codes.htm

explanation:
http://www.waltech.org/ldp/ldp.htm

Ok, I found the Leak Detection Pump and it wasn't located as what the website said where it should be. I found it behind the driver's side headlight. Apparently, a vacuum hose from the manifold to the LDP was disconnected and I put it back in. The engine light still comes on and I checked for code again, it sill says 1494. Do I need to reset this computer diagnostic thingy? If resetting is possible, How do I do it. Thanks.

Yes, I believe you do need to reset your computer diagnostic "thing", I think you can just turn off the car and unhook the battery for a bit and rehook it up, but Im not sure if thats the best/safest way to do it.

Weirdest thing, the check engine light doesn't light up anymore and no more code. I guess it goes off after 50 starts.

Hmm, interesting, well at least your problem is fixed.