P0171 is set when the pcm detects that bank 1 — the side of the engine containing cylinder #1 — is running with too much air relative to fuel Struggling with the 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.
P0171 Buick Encore OBDII Code Diagnosis and Explanation | Drivetrain
This code is common on both naturally aspirated and turbocharged engines, but the causes can vary depending on the engine design
A p0171 diagnostic code indicates that the fuel trim system is too lean
Learn possible causes, symptoms, and troubleshooting tips for p0171.
