P0174 Kia Telluride
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 Kia Telluride 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 Kia Telluride.
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 Kia Telluride.
Common Causes on Kia Telluride
- Intake manifold gasket leak on bank 2 of 3.8L V6
- PCV valve failure on passenger side of engine
- Cracked vacuum hose from heat exposure on bank 2
- Bank 2 fuel injector GDI carbon buildup restricting flow
- Mass airflow sensor drift at high mileage
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 Kia Telluride
Palisade and Telluride 3.8L V6 engines can develop bank 2 lean conditions from intake gasket deterioration and GDI carbon buildup.