P2272 Fault Code

O2 Sensor Signal Stuck Lean Bank 2 Sensor 2

• What does that mean?
• Symptoms
• Causes
• Solutions

The P2272 fault code indicates that the oxygen sensor signal for Bank 2 Sensor 2 is stuck in a lean condition. This means that the engine control unit (ECU) is detecting a consistently low voltage signal from the O2 sensor, suggesting that there is an excess of oxygen in the exhaust gases, which may indicate a lean air-fuel mixture.

What are the symptoms of the P2272 code?

• Check Engine Light (CEL) illumination
• Poor engine performance, such as hesitation or sluggish acceleration
• Decreased fuel efficiency
• Rough idle or engine stalling
• Failed emissions test due to high levels of unburned oxygen in the exhaust

What causes the P2272 code?

• A faulty O2 sensor that is malfunctioning
• Vacuum leaks in the intake system that can introduce extra air
• Fuel delivery issues, such as a clogged fuel filter or failing fuel pump
• Exhaust leaks near the O2 sensor that can affect readings
• Incorrectly set engine parameters or issues with the ECU

How to fix P2272?

• Inspect and possibly replace Bank 2 Sensor 2 O2 sensor
• Check for vacuum leaks and repair any identified issues
• Test the fuel delivery system and replace components as necessary
• Inspect the exhaust system for leaks and make necessary repairs
• Clear the fault codes and perform a test drive to verify that the issue has been resolved