P0174 Hyundai Santa Fe
System Too Lean (Bank 2) · Powertrain Code · High · Repair: Moderate
What is P0174?
The engine is running lean on bank 2. Same causes as P0171 but affecting the opposite cylinder bank on V-engines.
When the Hyundai Santa Fe triggers code P0174 (system too lean (bank 2)), it typically points to an issue in the powertrain system. This is a high severity code, so address it promptly to avoid further damage or safety concerns. Below you'll find the most common causes, symptoms, and repair options specific to the Hyundai Santa Fe.
This repair is rated moderate, meaning some experience and specialty tools required.
Diagnostic data on this page is compiled from publicly available repair resources and technical service bulletins. Always have a qualified mechanic confirm the diagnosis before authorizing repairs on your Hyundai Santa Fe.
Common Causes on Hyundai Santa Fe
- Intake manifold gasket leak on bank 2 of 3.5L V6 Santa Fe/Sorento
- PCV valve system failure on passenger side
- Vacuum leak at variable intake manifold actuator
- Bank 2 fuel injector flow imbalance from GDI carbon buildup
- Mass airflow sensor reading low
Symptoms
- Rough idle especially when cold
- Hesitation or stumble on acceleration
- Engine surging at steady throttle
- Lean misfire under load
- Poor fuel economy
- Check engine light illuminated
Notes for Hyundai Santa Fe
P0174 is uncommon on 4-cylinder Tucson and Sportage models as they only have one bank. V6 Santa Fe and Sorento models can develop bank 2 lean conditions.