P0174 Bmw Error Code
By the Editorial Staff
March 16, 2026
Has the P0174 BMW code popped up after an OBD2 scan? Don't worry; our detailed article has everything you need to know to solve this trouble code! The BMW P0174 code is a diagnostic trouble code (DTC) that indicates a problem with the fuel system in BMW vehicles. Specifically, it indicates that the mixture control 2 system is too lean in bank 2.
Code P0174 BMW Description The P0174 code for BMW indicates that the Mixture Control 2 System is too lean on Bank 2. This means that there is an imbalance in the air. Ok Folks, Hopefully I'm posting in the right spot.
I need some help. It's a 2002 BMW 325Ci with 143,000 miles. It has started running bad and throwing codes.
The P0174 and P0171 codes are the only ones left that I can't fix. The P0174 codes is always primary. I have 2 scanner tools, the Innova.
A BMW fault code P0171 or P0174 means that your engine is getting more air than fuel, also known as running "lean". Your BMW engine is equipped with oxygen sensors - small probes that extend into the exhaust system (usually near the catalytic converter) that measure the amount of oxygen left after combustion. BMW DTC P0174 - System Too Lean (Bank 2) - Learn how to fix it with our step-by-step diagnosis & repair guide.
Similar Threads 2007 BMW 528xi with Lean Code P0171 Bank 1 Only - DISA, O2, or MAF - Help! By ejbrooks in forum 2006 - 2012 (E90, E91, E92, E93). 🚗 Is your BMW showing Error Code P0174? Don't panic! This video will explain what P0174 means, why it happens, and how you can fix it yourself. more.
Make: BMW Code: P0174 Definition: Fuel System Too Lean (Cylinder Bank 2) Description: Key on or engine running, all electrical components off and coolant temperature at least 80 degrees Celsius; and the DME detected the Bank 2 Fuel Control System reached its lean correction limit. The fuel status is in a closed loop pattern, the coolant te Cause: Air leaks after the MAF sensor, or leaks in the. The BMW 3 Series P0174 System Lean Fix is a common concern for owners.
This diagnostic trouble code (DTC) P0174 indicates that the engine's computer, called the Digital Motor Electronics (DME), has detected a lean condition in Bank 2.