A Ford P0171 is a LEAN code for cylinder financial institution 1, and P0174 is a LEAN code for cyndrical tube financial institution 2. These codes typically take place on numerous Ford cars, and are established when the powertrain control module (PCM) sees the air/fuel mixture is running as well lean (too much air, insufficient fuel).
When the Check Engine Light begins, either among these codes, or both, may be located when a code visitor or scan tool is plugged into the vehicle analysis adapter. IF the car is driven long enough, typically both codes will certainly be established.
A P0171 lean code for financial institution 1 is the cyndrical tube rely on the RIGHT (passenger) side of the engine on Ford cars with a V6 or V8 engine and also rear-wheel drive.
A P0174 lean code for financial institution 2 is the cyndrical tube bank on the LEFT (vehicle driver) side of the engine on Ford lorries with a transverse-mounted V6 engine as well as front-wheel drive. This code is not set on 4 cylinder engines (no financial institution 2).