MAF or Mass Airflow sensor is a tool to read the airflow intake on engines. Cleaning it could be the solution, or just replace it with a new one. If all of those above are good, then a dirty MAF sensor could be the culprit. On the fuel side, the engine might have a lack of fuel due to a weak fuel pump, a blockage in the fuel filter, residue depositing on fuel injectors, or simply a leak around the fuel pressure regulator. Aside from that, a faulty EGR valve could have different readings due to a broken pressure sensor. The EGR valve could also be the root of this problem when they’re not closed properly, allowing too much airflow. The unmetered and excess air can then mix with the fuel inside. Some possible causes can include the damaged or dirty airflow sensor that can’t read airflow level correctly. Furthermore, other things could also happen, such as engine sputtering, lean misfire, or rough idling mechanism. If the condition is left unfixed, an overall poor engine performance could occur. It could also be caused by the disturbance in the fuel delivering system that makes the engine lack the needed fuel supply. The condition where the engine has too much air in the mixture is called lean mixture, and that happens when the engine is sucking too much air. Meanwhile, on Ford vehicles with front-wheel drive configuration along with a V6 engine, the P0174 is used for the cylinder bank 2 that can be found on the left side of the engine.
#Ford engine codes p0171 code#
On Ford vehicles equipped with a V6 or V8 engine with rear-wheel drive configuration, the P0171 lean code is reserved for the cylinder bank 1 located on the right side of the engine. Both codes are also set when the vehicle is driven for a long time. When one or both of those codes are detected, the Check Engine light will come on. In Ford vehicles, there are two codes for this occurrence, which are Ford P0171 for cylinder bank 1, and P0174 for cylinder bank 2.Ī code reader or scan tool can be connected into the vehicle diagnostic connector. When that happens, the mixture is called lean mixture and the powertrain control module (PCM) will set fault codes. When an engine mixes the air and fuel needed for combustion, there is a chance that the mixture has too much air.