My friends liberty isn't running on all cylinders. I used my handy dandy code reader and it showed the following:
P0302
P0203
P0201
P0203
he tried unpluging the number three injector and and he said there was no change in the way his liberty ran, does that prove that it's a bad injector? is it a big job to change one out? should they be replaced as a set?
My waranty is up in two weeks so I figured that I better be my involved in the up keep of my jeep so I told him I would try and help him with his (better to learn on someone else's eh )
Any input would be great
thanks

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2006 red kj CRD GDE eco tune 65000km

Well P0302 is cylinder #2 misfire,why pull #3 injector connector?

I guess I could be mistaken, he had off the second on in from the fire wall (would that be two or three?)

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2006 red kj CRD GDE eco tune 65000km

Number 4 is hard to see so still could be number 2, if under warranty, take to dealer.

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2006 Black Jeep Liberty CRD Limited
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P0302 - Cylinder #2 misfire
P0203 - Injector #3 short circuit low side to battery, or open load or short low side to high side
P0201 - Injector #1 short circuit low side to battery, or open load or short low side to high side

Strange to have all those injector issues at the same time. Try running at idle and unplugging each injector one at a time to isolate the effects. Check the wiring as well, maybe soething rubbed through causing the issue. Changing out injectors is not bad at all.

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Thanks for the advise. We'll see if we can sort things out and report back.

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2006 red kj CRD GDE eco tune 65000km