Ford Escape · Diagnostic Trouble Code
P0171 — System Too Lean (Bank 1)
Quick overview of P0171 on your Ford Escape. Read the full diagnosis guide, then find the repair guides for your vehicle below.
Repair guides that fix P0171
Ford Escape
2013-2019 Ford Escape — Fuel Pump Replacement
How to test fuel delivery when pressure is suspect.
Ford Escape
2013-2019 Ford Escape — PCV Valve Replacement
A stuck PCV valve is a classic lean-code cause.
Ford Escape
2013-2019 Ford Escape - Engine Air Filter Replacement
A restricted air filter can skew the air-fuel mixture.
Ford Escape
2013-2019 Ford Escape — Check Engine Light / OBD2 Diagnosis
What that light means and what to check first.
General diagnostic information, not a factory service procedure. If you're unsure, have a qualified technician confirm the diagnosis before buying parts.