Reading
No make or model yet. The reading below is the shared meaning, not a note about one car.
The first look at a new code takes a moment. We open public pages and keep only what they say. We do not guess.
That is the reading. Another code?
P0171
Get it soonThe car is adding extra fuel on one side because the mixture looks too thin.
The light is asking for a shop visit. Driving a short way is often possible, but waiting can hide a real problem or make the next repair larger.
Shared powertrain name. A brand-owned code on the same car can mean something else.
A shop will typically look at fuel trims, unmetered air, fuel delivery, and oxygen-sensor data for bank 1.