My Jeep is breaking my heart

I have a 2003 Jeep Liberty manual and every once in a while when i run it through the car wash the check engine light will turn on. I've gotten codes p0121, p0123, p1596, and most recently p1299 . I looked up the codes here on KJ country (thanks ) and i changed the throttle position sensor and map sensor...poor jeep still runs like crap since i got that p1299. I know what the codes mean and i can't seem to find any vacuum leaks...can anyone help me?

I dont think a car wash could cause those codes unless you pressure washed the engine.

no i don't pressure wash the engine, but the check engine light has turned on while i was pulling out of the car wash

Coincidence with the car wash??

That last code is for a vacume leak as you said so there must be one you missed?? I would check again. Maby a crack in one of the lines not easily found??

Dave

well, carwash and vacuum line. Vacuum lines are usually rubber. maybe, there is a cracked or damaged line and the temp diff between the carwash and ambient temp is making this flaw show up? IE its really cold outside and the ambient temp is warmer in the carwash. the carwash in cold temps always made my PT stall...

Listen for a sucking noise in the engine bay and under the Jeep. Thats the easiest way to find a vacuum leak.

GeekyJeep said:

well, carwash and vacuum line. Vacuum lines are usually rubber. maybe, there is a cracked or damaged line and the temp diff between the carwash and ambient temp is making this flaw show up? IE its really cold outside and the ambient temp is warmer in the carwash. the carwash in cold temps always made my PT stall...

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thats what i was thinking. i'll do a thorough check in the morning and see...

jeepjeepster said:

Listen for a sucking noise in the engine bay and under the Jeep. Thats the easiest way to find a vacuum leak.

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i'll do that, thanks!

...still no luck at the garage...

now the sucking sound is going to be coming from your wallet

ok just got it fixed...turns out the throttle position sensor i replaced the other broken one with was faulty...who would've thought!!

found the problem. JETCHIP Stage 2 is junk!!! removed it and PROBLEM SOLVED!

gijoe31484 said:

found the problem. JETCHIP Stage 2 is junk!!! removed it and PROBLEM SOLVED!

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Haha, glad you finally got it figured out after 2 years.

Smoke test.

yeah....only fried 10 or 11 throttle position sensors at $40 a pop before i figured it out.

JeepJeepster said:

Haha, glad you finally got it figured out after 2 years.

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