P2271 - OBD II Trouble Code

Our automotive experts have put together the following information about the P2271 diagnostic trouble code. We've provided the common symptoms that occur when this code is set along with the frequent repairs that address the issues related to the P2271 code.

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