![Need help troubleshooting intermittent P0171 "bank 1 system too lean", 07 I5 Z71 | Chevrolet Colorado & GMC Canyon Forum Need help troubleshooting intermittent P0171 "bank 1 system too lean", 07 I5 Z71 | Chevrolet Colorado & GMC Canyon Forum](https://i.ytimg.com/vi/ivYUOdxt4Io/maxresdefault.jpg)
Need help troubleshooting intermittent P0171 "bank 1 system too lean", 07 I5 Z71 | Chevrolet Colorado & GMC Canyon Forum
![P0171 fault code - System too lean (Bank 1) - Maintenance, TSB's & Recalls - Ford C-MAX Hybrid Forum P0171 fault code - System too lean (Bank 1) - Maintenance, TSB's & Recalls - Ford C-MAX Hybrid Forum](https://fordcmaxhybridforum.com/uploads/monthly_2020_07/image.png.b2567de8675cb8603eb9bcdd14d936f2.png)
P0171 fault code - System too lean (Bank 1) - Maintenance, TSB's & Recalls - Ford C-MAX Hybrid Forum
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Need help troubleshooting intermittent P0171 "bank 1 system too lean", 07 I5 Z71 | Page 2 | Chevrolet Colorado & GMC Canyon Forum
![Chased the p0171 and p0174 dragon for a long time. Fixed with new Fuel Pump. It went from 10-11mpg to 15-16mpg on highway. : r/GXOR Chased the p0171 and p0174 dragon for a long time. Fixed with new Fuel Pump. It went from 10-11mpg to 15-16mpg on highway. : r/GXOR](https://preview.redd.it/chased-the-p0171-and-p0174-dragon-for-a-long-time-fixed-v0-x0xmjdcpqvha1.jpg?auto=webp&s=5e9a053bc1995345aa0137c3d22beecfeac73f94)
Chased the p0171 and p0174 dragon for a long time. Fixed with new Fuel Pump. It went from 10-11mpg to 15-16mpg on highway. : r/GXOR
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