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ya my dads Screw with a 5.4 did that the other day with a small hill and 6000 lbs on a trailer behind it.... we cleared it and it never came back...it was about 2 weeks ago.... anybody know what causes this?
2012 F-150 SCREW 3.5TT FX4 3.73
2011 Mustang GT Premium Auto 5.0
2010 Taurus SEL
1999 F-150 SCAB 5.4l Lots of Mods
Mine came on while I was off the gas and coasting down a hill. The code reader snapshot said it occured at 614 rpms. I think I am going to wait to see if it comes back on again. If it happened while it was under load I would be more concerned.
i am getting the code p175 saying running rich bank 2 what should i do
Clean your Mass Air Flow sensor with brake cleaner or electrical cleaner, something that dries clean with no residue. Let it air dry. DO NOT touch the fine wire in the sensor, it is very delicate and breaks easily. Reset the code after it is cleaned.
John, aka KingRanchMan02
`02 F-150 King Ranch SuperCab
Charcoal Blue/Arizona Biege, 5.4L 3.55 LS, 4x2, Diablosport Predator Programmer, K&N filter. FTE Ride of The Week, 4/20/09 !!!
`08 Mercury Sable Premier, 3.5L Duratec, 6 speed auto
The check engine light came back on! This time it was p0171, bank 1. I reset the code and then started to do some investigating. I started by removing the air intake to clean the mass air flow sensor and throttle body.
After I did that I checked all the vacuum lines. Wouldn't you know it, I found a bad connector! The rubber vacuum elbow on the fuel pressure regulator had a huge hole it it. It looks like something hot touched it or someone tried removing it with pliers and ripped it.
I installed a new one and cleared the code. That should fix the check engine light problem. Only time will tell....
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