Chevrolet Malibu · Diagnostic Trouble Code
P0171 — System Too Lean (Bank 1)
Quick overview of P0171 on your Chevrolet Malibu. Read the full diagnosis guide, then find the repair guides for your vehicle below.
Repair guides that fix P0171
Chevrolet Malibu
2016-2025 Chevrolet Malibu — MAF Sensor Replacement
Cleaning and replacing the MAF sensor.
Chevrolet Malibu
2016-2025 Chevrolet Malibu — Fuel Pump Replacement
How to test fuel delivery when pressure is suspect.
Chevrolet Malibu
2016-2025 Chevrolet Malibu — PCV Valve Replacement
A stuck PCV valve is a classic lean-code cause.
Chevrolet Malibu
2016-2025 Chevrolet Malibu — Engine Air Filter Replacement
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.