The Care and Feeding of a Mass Air Flow Sensor
#21
My mechanic said 90% of the time when p0171 and p0174 come up on a 97-03 f150, it is due to vacuum leaks. I just had those codes a couple weeks ago. I just replaced a couple hoses and it's good now.
The following users liked this post:
JLGJR (03-16-2017)
#24
Attachment 289809
Cleaned my MAF but my check engine light remains illuminated, any ideas on the probable cause? codes of both P0174 and P0171 are what i was given in the diagnostics.
Cleaned my MAF but my check engine light remains illuminated, any ideas on the probable cause? codes of both P0174 and P0171 are what i was given in the diagnostics.
Mine was showing the same codes and I first cleaned the MAF, only to later discover it was a collapsed hose. Amazon sells that hose (OEM Spec - Ford part) for about $25.
#25
When I first got my truck and was trying to solve my surging idle I read to use rubing alcohol with a q tip. That was almost 2 years ago with no ill effects. Of course I would use the proper cleaner today. My surging idle was lower intake gaskets. Lean both Banks
#26
I'm geting a PO174 code from my "99 F150 4.2L pickup. That's too lean on the right back (passenger) cylinders. Both of the little wires, filaments the Mass air sensor are about twice as thick as the filaments, about 1/4" long, and are a light grey color. I use a K&N filter, which is pretty dirty at the moment. Is the sensing portion of the filament supposed to be this color?
Thanks, Shoman
Thanks, Shoman