P2271 Fault Code

O2 Sensor Signal Stuck Rich Bank 1 Sensor 2

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

The P2271 fault code indicates that the O2 (oxygen) sensor signal for Bank 1 Sensor 2 is reporting a rich condition. This means that the sensor is detecting a higher than normal level of oxygen in the exhaust gases from the engine, which can lead to poor fuel economy and increased emissions. Diagnosing this issue requires careful inspection of the exhaust system and the O2 sensor itself.

What are the symptoms of the P2271 code?

• Check Engine Light illuminated on the dashboard
• Increased fuel consumption or diminished fuel efficiency
• Rough idling or stalling issues
• Poor engine performance, such as hesitations or lack of power
• Emissions test failure due to rich mixture readings

What causes the P2271 code?

• Malfunctioning O2 sensor
• Exhaust leaks before the sensor
• Fuel system issues such as excessive fuel delivery or improper air-fuel mixture
• Wiring issues or bad connections in the O2 sensor circuit
• Engine performance problems affecting fuel combustion

How to fix P2271?

• Inspect the O2 sensor wiring and connectors for damage or corrosion
• Replace the faulty O2 sensor if it is confirmed to be malfunctioning
• Check for any vacuum leaks or exhaust leaks that may affect the sensor readings
• Test the fuel delivery system and make necessary adjustments to the air-fuel mixture
• Verify that the engine is running properly with no underlying performance issues