Po 171
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Freshman User
Joined: Jul 2005
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Po 171
I have a 2000 F150 with 4.2L V6 with 110,000 miles on it. A week a good my check engine light came on again and the code is 171 (too lean bank 1). 4 months ago the light came on and the shop said it was the PVC valve assembly so I replaced the assembly and valve, reset the computer and the light went off. 4 months later, same code. The engine idles the same, no difference in mpg, and I tuned it up at the same time I replaced assembly. Any suggestions on what caused it this time?
Elder User
Joined: Jun 2005
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never worked with a V-6 so I don't know where it goes but that is your lean problem, take two people and trace it you have to replace it any way, sounds like it's time to start replacing all your vaccum hoses or they will start leaking one at a time. easy test is to remove a hose and squeeze the end and look at it if the inside hose is all cracked then it needs to be changed.
Lance
Lance
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thanks lance. i took the elbow to the dealership and they said I can't get just the part and that I have to replace the whole assembly. I checked all local parts stores and they don't have it so I will continue my search tomorrow. any suggestions?
Lead Driver
Joined: Dec 2003
Posts: 6,773
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From: On the road in Ohio
Easy fix for ya but it will cost you big bucks.... 
Ready? i hope that you are sitting down..... it will cost about buck and a half..remember the old stlye coils? the ones with the coil wire the had a 90 degree bend on the rubber boot? That rubber boot will fit as a replacement. just pull it off the coil wire, and lube the end and it will slip over the end of the pcv tube , the other over the vacumm port.
Ready? i hope that you are sitting down..... it will cost about buck and a half..remember the old stlye coils? the ones with the coil wire the had a 90 degree bend on the rubber boot? That rubber boot will fit as a replacement. just pull it off the coil wire, and lube the end and it will slip over the end of the pcv tube , the other over the vacumm port.
