Check Engine P1131
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Check Engine P1131
Hi all, I've 97 F150 4.2 V6 Supercab, I'm not sure who's fault was it, starting from L.A I put a Gumout Fuel Injector Cleaner and a Full of Super unleaded. after i drove over 150 miles coming back home, "Check Engine light on" Truck was fine no problem at all, So the next day i when to Autozone to rent the Readers code. Plug Reader and i got "P1131 Manfacturer Control Fuel Air Metering" and I don't have any clue where start, Any help will be much appreciated.
Thanks
Roland
Thanks
Roland
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Joined: Aug 2002
Posts: 12,679
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From: BC, Canada
Hi Roland and welcome to the forum 
A P1131 means that the truck's computer (PCM) thinks the engine is running too lean and has richened up the air/fuel mixture as much as it can to try to compensate for it.
Checking for vacuum leaks would be a good place to start. How old is your fuel filter? Ever cleaned the MAF sensor? How old are your spark plugs?
A P1131 means that the truck's computer (PCM) thinks the engine is running too lean and has richened up the air/fuel mixture as much as it can to try to compensate for it.
Checking for vacuum leaks would be a good place to start. How old is your fuel filter? Ever cleaned the MAF sensor? How old are your spark plugs?
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Hi, Thank for replying to my post! Well it's been over 50,000 miles since dealer replaced my Fuel Filter, Maf sensor and spark plugs still original never been touch. I guess these will be week-end project for me, Ok one more thing need a book to start, I'm open for any suggestions and guidance..thank you again.
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Joined: Aug 2002
Posts: 12,679
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From: BC, Canada
A shop manual would be a good idea but if you look in the Frequently Asked Questions at the top of this forum and do some snooping around in here you'll probably find all the info you need to do the work.
Good luck, have fun and let us know how it goes
Good luck, have fun and let us know how it goes
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Hi, My truck is back on the road again!!!Thank you Racerguy for the info. Replaced Air filter, Cleaned MAF sensor and disconnected battery fo few minutes. Started the truck the next day and the check engine light was gone..Thanks again Racerguy and Ford truck enthusiasts..
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