id try the coil. i had p 171, p174 ,p301 which is cylinder 1 and 4 are lean and the 300 codes are misfire codes i changed plugs wires and coil worked fine
How to fix bank 1to lean on a 3100 v6
lean bank 1 lean bank 2 fuel trim limits reached
Fuel system lean bank number 2Fuel system lean bank number 2
A vacuum leak can cause a lean burn.
what does system to Lean Bank 1 on 740iL 2001 means
Trouble code P0171 means: Fuel Trim System Lean (Bank 1
No , but lean conditions can cause the misfire
Hard to answer that without knowing the year, make, model and engine info. Whenever I see "lean condition" I look for vacuum leaks first.
The Error code P0171B. The cause??? Help! vacuum leak. dirty injectors( 4 or 6 cyl.?)
P0171-system too lean bank 1 and P0174-system too lean bank 2
P0171 System too Lean (Bank 1)
Bank 2 running too lean.