P1174
Systeem
Powertrain (Fuel/Air)
Scanner vereist
Enhanced OBD2 scanner (live data graphs, freeze frame, battery voltage test)

Fuel System Lean at Idle (Bank 1)

Understand P1174, common causes, and the right FOXWELL scanner to diagnose it.

Bank 1 lean condition detected specifically at idle — vacuum leak or dirty MAF common.

Veelvoorkomende symptomen

  • Rough idle
  • Hesitation off idle
  • May set with P0171

Typische oorzaken

  • Vacuum leak at intake
  • Dirty MAF sensor
  • PCV leak
  • Low fuel pressure at idle

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 P1174 with a basic code reader?
P1174 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 P1174?
It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.