P0171 means your engine is running lean on bank 1 — the most common fix is cleaning the maf sensor ($8, 10 minutes)
This code sets when the pcm (engine computer) has added as much extra fuel as it.
The p0171 diagnostic trouble code indicates that the fuel trim system on bank 1 is operating too lean
Common causes include vacuum leaks, faulty.
P0171 means system too lean (bank 1)
Learn symptoms, common causes, how to diagnose fuel trims, and proven fixes for vacuum leaks, maf, and fuel issues.
Complete guide to p0171 system too lean (bank 1)
Check engine light, rough idle, hesitation on acceleration
Dealing with a p0171 code
A p0171 code, “system too lean (bank 1),” means your engine is running with too much air or too little fuel, triggering the check engine light and risking damage if ignored
This guide covers the p0171.
This code means your engine is getting too much air or not enough fuel
P0171 means your engine is running too lean on bank 1