Code P1139/Failed Inspection...

TAG781 · #1 02-06-2006, 04:05 PM

I went in to get an inspection sticker today thinking everything was alright. No lights on my dash... The guy got a code P1139. I guess it's bad O2 sensor?? Does anyone know which O2 sensor it is? Anyone gotten this code before? If so what resolved it? Thanks.

maxwedge · #2 02-06-2006, 04:33 PM

p1139 is a water in fuel code, may be you have it wrong

TAG781 · #3 02-06-2006, 06:33 PM

Pretty sure that's what it said. PCM P1139. But i'll double check tomorrow. If that is the case how do I fix that? Water in the fuel? Anything I can buy??? TIA!!

maxwedge · #4 02-06-2006, 06:36 PM

I think that may pertain to diesels, but get the right code and we will see.

TAG781 · #5 02-07-2006, 12:11 PM

OK I pulled two codes from the car... PCM PO139 and IPC U1255... Any idea what these mean? And how to fix them? Thanks.

maxwedge · #6 02-07-2006, 01:04 PM

Slow switching of o2 sensor bank one ,# 2 sensor, this could be a bad sensor or a poor connection. U1255 is a network comm ,clear it and see what happens.

TAG781 · #7 02-07-2006, 03:43 PM

In case I have to replace the sensor. Is this the one before or after the cat?? Thanks...

maxwedge · #8 02-07-2006, 06:17 PM

Count back from that bank, if there are 2 in that pipe from the head, the second one is the one. usually there is one on each bank and then the one behind the cat, some engines use one on each bank and another one just before the cat as well.

syncmaster · #9 06-25-2010, 10:33 AM

Quote:

Originally Posted by TAG781

In case I have to replace the sensor. Is this the one before or after the cat?? Thanks...

Yes,it is after the cat.

if you have a flex coupling in the exhaust pipe it could be leaking and causing the po139 code

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