armin922 Posted January 29, 2010 Report Share Posted January 29, 2010 ok so my buddies truck which is an 03 ford f150 V6 check engine light came on. We go to autozone to get it scanned and 2 codes came up. P1151 and P1131. This is what came up on the receipt from autozone when they printed this out for us. Im going to try to clean his MAF with MAF cleaner and see if it will clean it bc im thinking it may be dirty. His truck has 60k miles on it. And also check for vaccum leaks. If those dont work maybe the 2 upper o2 sensors on each header needs to be replaced? P1151-Lack of 02 switches-bank 2 sensor 1. Could not adjust fuel trim because of lean or rich condition Probable cause: fuel pressure high or low MAF sensor dirty/defective Vaccum Leak on engine Leaking fuel injector or fuel pressure regulator P1131 lack of bank 1 o2 transitions-lean. detected bank 1 o2 at its lean limit. Probable cause: misfire on bank 1 Vaccum Leak affecting bank 1 only Fuel Injector problem bank 1 Engine mechanical condition Quote Link to comment Share on other sites More sharing options...
Guest Removed Posted January 29, 2010 Report Share Posted January 29, 2010 check fuel pressure, check for vacuum leaks. plus autozones code reader, wont pull out all the codes. just went thru this the other day. when pulling codes from a ford, there are several ways it need to be done. Quote Link to comment Share on other sites More sharing options...
armin922 Posted January 29, 2010 Author Report Share Posted January 29, 2010 only problem is that i dont have a fuel pressure gauge and not sure where to hook it up to get the correct reading. But i will check for leaks. Do you think i should go to advance auto parts to get it rescanned? Quote Link to comment Share on other sites More sharing options...
Guest Removed Posted January 29, 2010 Report Share Posted January 29, 2010 auto zone dont have any thing more then a cheap scanner. is there no valve on the fuel rail(its rather small) to hook up a pressure gauge too? and on that one, you can read fuel pressure in the data stream on a good scan tool Quote Link to comment Share on other sites More sharing options...
armin922 Posted January 29, 2010 Author Report Share Posted January 29, 2010 ok. THANKS ROB! ill check it out Quote Link to comment Share on other sites More sharing options...
armin922 Posted February 1, 2010 Author Report Share Posted February 1, 2010 ok so we just tried the easy and cheap alternative, i had a spary can of MAF cleaner and we sprayed his MAF and tada!! Started the truck and no CEL. So it must of been a dirty MAF. Didnt know that could make a big difference. THANKS Quote Link to comment Share on other sites More sharing options...
Guest Removed Posted February 1, 2010 Report Share Posted February 1, 2010 that will do it on a ford..i clean mine every 3 months or so anymore Quote Link to comment Share on other sites More sharing options...
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