Thread: P0463,P1391
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Old March 24th, 2016, 19:40
J33p98 J33p98 is offline
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Join Date: Mar 2016
Location: New Jersey
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P0463,P1391

Hey Guys

I was wondering if anyone has run into this problem. I have a 1998 xj 4.0L
I have absolutely no driveabilty problems at all, however the MIL light stays on with the following 2 codes P0463,P1391, the light will go out usually when I get to a little less then a half a tank of gas and stay out for a few starts. This has been going on for about 4 years right after I had the engine rebuild. When the light goes out I can easily get through emission inspection. I just never know how long the lights will stay out so it's pain getting it through inspection. I did replace the KPS with an OEM one 4 yrs ago but that never solved the problem.

Any information would be greatly appreciated
Thanks
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