'99 w/ 4.2 - Codes P0171 & P0174.
#1
'99 w/ 4.2 - Codes P0171 & P0174.
Hello!
First off, I'd like to thank all of the guys here for the amazing wealth of knowledge on this board, I've learned TONS of information in the last 2 days and it wouldn't have been possible without them.
I just purchased my first F150, it's a '99 STD w/ the 4.2L. It's got 73K miles on the clock and I just picked her up yesterday.
My question is this, I'm getting 2 codes: P0171 and P0174. Lean on Bank 1 and Bank 2. Doing some research here on the forums led me down the path of possibly a leak at the Intake.
I checked the PVC tube as I noticed some oil buildup around the top of the valve cover, but the tube checked ok and holds air.
What should I be checking for?
Thanks!
-Brian
Codes:
-P0171: System Too Lean (Bank 1) (Powertrain, Generic)
-P0174: System Too Lean (Bank 2) (Powertrain, Generic)
First off, I'd like to thank all of the guys here for the amazing wealth of knowledge on this board, I've learned TONS of information in the last 2 days and it wouldn't have been possible without them.
I just purchased my first F150, it's a '99 STD w/ the 4.2L. It's got 73K miles on the clock and I just picked her up yesterday.
My question is this, I'm getting 2 codes: P0171 and P0174. Lean on Bank 1 and Bank 2. Doing some research here on the forums led me down the path of possibly a leak at the Intake.
I checked the PVC tube as I noticed some oil buildup around the top of the valve cover, but the tube checked ok and holds air.
What should I be checking for?
Thanks!
-Brian
Codes:
-P0171: System Too Lean (Bank 1) (Powertrain, Generic)
-P0174: System Too Lean (Bank 2) (Powertrain, Generic)
Last edited by bsdam; 06-28-2014 at 11:59 AM.
#4
Just wanted to update this thread, I poked around the intake plenum with some carb cleaner and found a leak. During the gasket replacement I discovered 2 extremely worn vacuum hoses. I replaced them as well as the DPFE Sensor (the hose barbs were pretty much gone on it).
Now she runs great, lots of power and no more idle/stumble issues. The CEL has stayed off since the codes were cleared.
Thanks again for the help, I really appreciate it.
Just have to adjust the rear brakes and go over the front end and we are back on the road.
Now she runs great, lots of power and no more idle/stumble issues. The CEL has stayed off since the codes were cleared.
Thanks again for the help, I really appreciate it.
Just have to adjust the rear brakes and go over the front end and we are back on the road.