FORD EXPEDITION 97

Question

I HAVE THE CODE P0301,P014,P0171
I CHANGED THE CABLE,AIR FILTER,THE INYECTOR #1 AND STILL WITH THE PROBLEM WHAT CAN I DOING NEXT

Answer 1

P0301 Misfire number 1 cylinder

P0171 Fuel trim lean Bank 1

Mechanical condition would need to be ruled out, low compression of that cylinder will set a misfire code, The best way to find if the problem is with the cylinder head is to do a leak down test.

Comments

mo st times on Ford products in a lot of others the ignition coil is most likely the problem a misfire on cylinder 1 which is also Bank One the unburnt gas will cool the O2 sensor and it will throw a po171 which is lean on bank 1 need to replace number 1 coil And clear codes and sea witch ones come back