P0174
System Too Lean Bank 2
P0174 is an OBD-II diagnostic trouble code meaning: System Too Lean Bank 2. Common causes: vacuum leak in bank 2, dirty or faulty air flow sensor. Estimated repair cost: $22–167.
Symptoms
- Unstable idle
- Power Loss
- Increased fuel consumption
- Check Engine Light Illuminates
Causes
- Vacuum leak in bank 2
- Dirty or faulty air flow sensor
- Faulty injectors in bank 2
- Problems with the fuel pump or fuel pressure regulator
- Clogged fuel filter
- Malfunction of the oxygen sensor in bank 2
How to Fix
- Check the tightness of the intake tract for leaks
- Diagnose the air flow sensor
- Check the functionality of bank 2 injectors
- Measure the pressure in the fuel rail
- Check the condition of the fuel filter
- Check the operation of oxygen sensors
Related codes
Error P0174 by Vehicle Brand
FAQ
What does the P0174 code mean?
P0174 is an OBD-II diagnostic trouble code that indicates: System Too Lean Bank 2
What causes a P0174 error code?
The most common causes of P0174 include: Vacuum leak in bank 2; Dirty or faulty air flow sensor; Faulty injectors in bank 2; Problems with the fuel pump or fuel pressure regulator.
How do I fix a P0174 diagnostic trouble code?
To fix P0174: Check the tightness of the intake tract for leaks. Diagnose the air flow sensor. Check the functionality of bank 2 injectors. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0174?
Limited driving only, diagnose soon
How much does it cost to fix P0174?
The estimated repair cost for P0174 is $22–167. Actual cost depends on your vehicle, location, and labor rates.
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