P2275 Fault Code

O2 Sensor Signal Stuck Rich Bank 1 Sensor 3

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

The P2275 fault code indicates that the oxygen (O2) sensor signal for Bank 1 Sensor 3 is stuck in a rich condition. This means that the sensor is reading an excessively high level of oxygen, leading the engine control module (ECM) to believe that the air-fuel mixture is rich.

What are the symptoms of the P2275 code?

• Check Engine Light (CEL) illuminated
• Poor fuel economy due to incorrect air-fuel mixture
• Rough idling or stalling of the engine
• Increased emissions during vehicle testing
• Lack of engine power under acceleration

What causes the P2275 code?

• Malfunctioning O2 sensor
• Wiring issues or bad connector related to the O2 sensor
• Fuel injector problems causing excessive fuel delivery
• Vacuum leaks causing a rich condition
• Faulty engine control unit (ECU) or issues with the fuel system

How to fix P2275?

• Inspect and potentially replace the O2 sensor for Bank 1 Sensor 3
• Check wiring and connectors for damage or corrosion
• Test the fuel injectors for proper operation and replace if necessary
• Investigate and fix any vacuum leaks in the intake system
• If all else fails, consider checking or replacing the engine control unit (ECU)