Loss of power po171 & po303
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Loss of power po171 & po303
I have a 1998 f150 4.6 and have had the po171 code and the po303 it idles fine but has no power and misses when give it any gas at all any help would be so appreciated thanks so much
Senior Member
Joined: Oct 2009
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From: Corona, Crazyfornia
P0303 is cylinder 3 misfire-plug or wire most likely, could be a coil.
P0171 is lean condition on bank 1. Which the PCM has tried to correct it by making the air/fuel ratio richer. Usually caused by a vac leak, or could even be an exhaust leak. If you have been ignoring the P0171 for a long time, there could be a chance that the cat is cooked.
Good luck
P0171 is lean condition on bank 1. Which the PCM has tried to correct it by making the air/fuel ratio richer. Usually caused by a vac leak, or could even be an exhaust leak. If you have been ignoring the P0171 for a long time, there could be a chance that the cat is cooked.
Good luck