blazinrebel

my truck is giving me a code saying that bank 2 is running lean. I can't figure out what it is. Has any one else had this code or an idea what of could be. The truck has the 4.2l

Broncomanjoe

Got the same thing Its PO174? Put a post up earlier but no help yet..

seniorFORDtech

you need to replace the intake plenum gasket and the
(isolator bolts) this will fix your problem..

sharptp

2001 4.2 ltr
Mine had the P0171 & P0174, both lean codes. Cleaned my MAF and they have not come back yet. It's been 3000 miles since.

smokedisranch

i have both lean codes and throttle poss code came to find out that i have a wiped out cam which isent moveing the valve

Devinjw520

Had both banks lean on my truck and it was as simple as a vacuum leak. fixed the leak with a piece of rubber fuel line and alls good

blazinrebel

not really sure wat u r talking about here. could u give me a little of info?

Broncomanjoe

Me and Blazin don't have both codes thats the problem.. I have also been told that the plenum gasket may cause this so I'm gonna go ahead and do that I think..I have a 5.4.. the only people that have given me that advice have had 4.2's does that make any difference?

Franchi

It could also possibly be a O2 sensor that's on the fritz....

That going out would throw that code I believe.

bigcedar

ok ,this may be the same problem i had with mine . i was getting codes po171 and po174 (bank one and bank two running lean ). there was a tsb posted for f150's 2001 - 2003 . What you may need to do is replace the port gaskets and the isolatator bolts between the upper and lower intake manifold . I did this myself and it took about 4-5 hours to do . parts where around 135.00 and you need to get them from a ford parts dealer . you also need to get a repair manual so you know the tighting pattern . Hope this helps . Good luck !