Honda Accord · Diagnostic Trouble Code
P0171 — System Too Lean (Bank 1)
Quick overview of P0171 on your Honda Accord. Read the full diagnosis guide, then find the repair guides for your vehicle below.
Repair guides that fix P0171
Honda Accord
2008-2012 Honda Accord — MAF Sensor Replacement
Cleaning and replacing the MAF sensor.
Honda Accord
2008-2012 Honda Accord — Fuel Pump Replacement
How to test fuel delivery when pressure is suspect.
Honda Accord
2008-2012 Honda Accord — PCV Valve Replacement
A stuck PCV valve is a classic lean-code cause.
Honda Accord
2018-2022 Honda Accord — Replace Engine Air Filter
A restricted air filter can skew the air-fuel mixture.
General diagnostic information, not a factory service procedure. If you're unsure, have a qualified technician confirm the diagnosis before buying parts.