P0174 Chevrolet Traverse
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 Chevrolet Traverse 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 Chevrolet Traverse.
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 Chevrolet Traverse.
Common Causes on Chevrolet Traverse
- Intake manifold gasket leak on bank 2 of 3.6L V6
- Cracked PCV hose on passenger side of engine
- Fuel pressure regulator failure causing low fuel pressure
- Bank 2 fuel injector electrical connector corrosion
- Vacuum leak at EVAP purge solenoid connection
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 Chevrolet Traverse
The 3.6L V6 in Traverse and Acadia is prone to intake gasket leaks. If P0171 is also present, suspect a common cause like MAF or fuel pressure.