P0174
Systeem
Powertrain (Fuel/Air)
Scanner vereist
Enhanced OBD2 scanner (live data graphs, freeze frame, battery voltage test)

System Too Lean (Bank 2)

Understand P0174, common causes, and the right FOXWELL scanner to diagnose it.

Same as P0171 but detected on bank 2 of a V-engine. Often appears together with P0171 when there is a common cause like a vacuum leak or MAF issue.

Veelvoorkomende symptomen

  • Rough idle
  • Poor acceleration
  • Often paired with P0171

Typische oorzaken

  • Vacuum leak affecting both banks
  • MAF sensor out of range
  • Fuel delivery problem
  • Exhaust leak affecting O2 readings

Welke scanner heb je nodig?

Enhanced OBD2 scanner (live data graphs, freeze frame, battery voltage test)

Gebruik live data en freeze frame voordat je onderdelen vervangt. ABS-, SRS- en U-codes vereisen meestal een full-system scanner.

Diagnosetips

  • Leg freeze frame vast wanneer de code voor het eerst verschijnt
  • Wis de code pas na het oplossen van de oorzaak
  • Controleer op gerelateerde pending codes
  • Controleer of accuspanning boven 12,4 V is voordat je sensoren suspecteert

Aanbevolen FOXWELL scanners

Veelgestelde vragen

Can I diagnose P0174 with a basic code reader?
P0174 may set in the engine module, but related diagnostics often benefit from an enhanced or full-system scanner with live data and freeze frame.
Is it safe to drive with P0174?
It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.