Code P0171

[heavyhemi55]

I have this code on my 2018 6.4 hemi P0171 n can't find the problem!

 

[markabby]

good luck with that..maybe a dealer can find the exact cause

A "P0171" code on a Ram truck indicates that the engine is running "too lean" on Bank 1, meaning the air-fuel mixture contains too much air and not enough fuel, which is usually caused by issues with the oxygen sensors, mass airflow sensor, fuel system, or potential vacuum leaks.


Key points about P0171:

• Meaning: "Fuel Trim System Too Lean (Bank 1)"
  
  
  
• Possible causes:
  • Faulty upstream oxygen sensor on Bank 1
    
    
    
  • Failing mass airflow sensor
    
    
    
  • Low fuel pressure
    
    
    
  • Leaky fuel injectors
    
    
    
  • Vacuum leaks
    
    
    
  • Damaged intake manifold gaskets