Finally a code popped up

[Warden]

P0174 Bank 2 too lean

What could cause this? Would this have anything to do with the stumble idle I have? I want to replace the IAC.

 

[ground_zero298]

might also be a o2 sensor on bank 2

 

[mmtphoto]

Most probably a vacuum leak on that side, less common reason is a dirty MAF or possibly a faulty EGR-
O2 sensor is not the problem.

 

[ground_zero298]

lol, sorry for the bad info, everytime I use to get a lean bank 2 it was a o2 sensor on my truck.

 

[XLRVIII]

Most probably a vacuum leak on that side, less common reason is a dirty MAF or possibly a faulty EGR-
O2 sensor is not the problem.

Vacuum leaks cause lean bank1 AND lean bank 2.
There is not a "bank 1 side of the intake".

Vacuum leaks affect "both" sides.

usually "single side" lean codes point TO an O2 sensor issue.

 

[XLRVIII]

Most probably a vacuum leak on that side, less common reason is a dirty MAF or possibly a faulty EGR-
O2 sensor is not the problem.

can you expound on how the vacuum leak in a "common plenum" intake causes a single side to run lean?

 

[Frogman]

Vacuum leaks cause lean bank1 AND lean bank 2.
There is not a "bank 1 side of the intake".

Vacuum leaks affect "both" sides.

usually "single side" lean codes point TO an O2 sensor issue.

+1

 

[mmtphoto]

exhaust leak on that side would do that-O2 sensor was replaced, still there-

 

[Frogman]

I think I just got a little dumber....

 

[XLRVIII]

exhaust leak on that side would do that-O2 sensor was replaced, still there-

exhaust leak BEFORE the 02 sensor would..yes.

 

[kustomizingkid]

Hahahaha.... my F150 didn't pop a code until the exhaust had SEPARATED from the manifold

 

[ground_zero298]

Hahahaha.... my F150 didn't pop a code until the exhaust had SEPARATED from the manifold

LMAO, takes a 150 abour 32 hours to pop a code.

 

[Warden]

BTW - not sure if this matters but 2 codes were actually found by the scanner. Both were this code!