Mercedes-Benz GLA · Diagnostic Trouble Code
P0171 — System Too Lean (Bank 1)
Quick overview of P0171 on your Mercedes-Benz GLA. Read the full diagnosis guide, then find the repair guides for your vehicle below.
Repair guides that fix P0171
General diagnostic information, not a factory service procedure. If you're unsure, have a qualified technician confirm the diagnosis before buying parts.