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P0171,P0174 could use some direction
Posted to Technical Discussion Forum on 12/4/2023 25 Replies

Hi Folks,

Have a Yukon here that is setting a P0171,P0174 it also has a P0446 which I don.t believe is related but I could be wrong.

The customer has replaced several parts with no success. The lean codes are setting at idle off idle the fuel trim correcti... Login to read more.

25 Replies Received (View Replies)

 

car Vehicle Data

2004 GMC Yukon XL 1500 SLT 5.3L

Engine5.3 L
Trans4-speed Automatic (Electronic)

car Vehicle Data

2004 GMC Yukon XL 1500 SLT 5.3L

Engine5.3 L
Trans4-speed Automatic (Electronic)