P0174 Jeep Grand Cherokee
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 Jeep Grand Cherokee 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 Jeep Grand Cherokee.
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 Jeep Grand Cherokee.
Common Causes on Jeep Grand Cherokee
- Intake manifold gasket leak on bank 2 of 3.6L Pentastar V6
- Cracked PCV hose on passenger side of engine
- Bank 2 fuel injector failure or restriction
- Vacuum leak at intake manifold runner flap actuator
- Exhaust manifold crack on bank 2
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 Jeep Grand Cherokee
The 3.6L Pentastar V6 in Grand Cherokee and Cherokee is known for oil consumption which can foul bank 2 components. Check for oil-soaked connectors.