Questions & Answers for: how to fix po171

How to fix error code po171 I have a sonoma that has the error code po 171 and acts like it wants to die, how can i fix this probelem. Can any one help? i strongly believe it is your fuel pump

...PO171. Could it be my K&N air fileter? How do I fix this problem? P0171 - Fuel Trim System Lean Bank 1 YOU WILL NEED TO AVE THE DEALER TEST THE O2 SENSOR FOR PROPER SWITCHING, RIGHT NOW IT SHOWS ...

...fix Code PO171- Lean mix of Bank 1. Code PO174- Lean mix of Bank 2. Most of the time a P0171 and P0174 is caused by either a vacuum leak--more than likely the PCV hose and valve or a dirty or ...

PO171 and PO174. These are the O2 sensor codes but I think I have a vacuum leak problem. How can I find the leak and how can I fix it? Please help with advise. Common fault is leaking gasket on intake

PO171 & PO174 .How to fix the problem? You should be replacing all upstream oxygen sensors, the ones at the inlet or pipe before the converter,on all your vehicles at 100,000 miles Go to Rock Auto

...fix code PO171 & PO174 ? This is a tough one could be mass air flow sensor ,oxyegen sensors,a fuel filter. a vacum leak, a pcv valve if i missed anything just google po 171 &174 look for fix ...

po171 code lite only during cold weather po171 and 174 code number. how can I fix the problem.2002 ford sports track. thank you .

...po171-174 and p2198 how can i fix it damaged or worn out oxy, censer . Have tested or replaced. these all point to the MAF sensor or air filter , the MAF sensor may just need cleaning with some brake ...

po171 how to fix you will have to check the sensor to see if its working properly. if not it will have to be replaced. if it is then you will have to check for a vacuum leak on that bank, dirty or bad

...fix theses problems First step is to look up Jeep trouble code PO171 This is the link I found: http://engine-codes.com/p0171_jeep.html I don't know about the airbag or abs lights. My old AMC concord ...