Causes and Fixes P2270 Code: O2 Sensor Signal Stuck Lean Bank-1 Sensor-2

How to fix a P2270 engine code: O2 Sensor Signal Stuck Lean Bank 1 Sensor 2
A P2270 Code is set when the Bank-1 upstream Sensor-2 oxygen sensor reports a lean air-fuel mixture.
A lean condition exists if the engine is getting more air than fuel in the cylinders. (Air/Fuel Ratio is wrong)
P2270 Code can be problematic since it can be caused by many things.

Possible Causes of a P2270 Code:
Bad Oxygen Sensor
Wiring (Open Short)
Exhaust leak
Intake Air Leak
Lean Running Condition (Usually Will Have Other Codes)

By using this information user assumes all risk of use.
www.backyardmechanic.org