2012 Mitsubishi Eclipse Spyder OBD2 Code P2271 O2 Sensor Signal Biased/Stuck Rich

What Does P2271 Code Mean?

OBD-II Code P2271 is defined as a O2 Sensor Signal Biased/Stuck Rich

The oxygen sensor measures the amount of oxygen in the exhaust between the engine and the catalytic converter. This sensor is supposed to fluctuate a minimum of 10 times per second within a specified voltage. If the engine's control module (PCM) does not see the correct fluctuations, the PCM will set code P2271.

P2271 Symptoms

• Decreased engine performance
• Increased fuel consumption

Common Problems That Trigger the P2271 Code

• Clogged air filter
• Oxygen sensor failure
• Powertrain Control Module (PCM) failure
• Wiring issue

Common Repairs Needed for the P2271 Code

• Oxygen Sensor Replacement