Feb 12, 2023 · If your professional scanner picks up the P2271 code, you know to look at the oxygen sensor, but how can the problem be resolved? In this guide, we look at what the …

The P2271 code indicates that the Oxygen (O2) sensor signal for Bank 1 Sensor 2 is biased or stuck rich. This means that the O2 sensor is detecting a consistently rich air-fuel mixture in the …

P2271 means the power‑train control module (PCM) sees a Bank 1 Sensor 2 O₂ signal that is biased or stuck rich. Drivers most often notice a steady “Check Engine” light, poorer fuel …

Learn about P2271 symptoms, causes, and potential solutions from the diagnostic experts at RepairPal.

When this code appears, it means that the O2 sensor is reporting a consistently rich fuel mixture. In simpler terms, there’s too much fuel compared to air in that specific bank of cylinders. This …

What is OBD-II Code P2271 – O2 Sensor Signal Biased/Stuck Rich Bank 1 Sensor 2. OBD-II Code P2271 refers to a problem with the oxygen sensor signal in the second sensor in Bank 1 …

Jun 8, 2025 · Learn all about the P2271 code, what causes O2 sensor signal biased/stuck rich, and how to diagnose and fix common issues to maintain optimal engine performance.

While a P2271 means the engine control module has detected a stuck rich or biased rich signal from bank 1, sensor 2, it is essential to note that several issues can be the leading cause. …

How to quickly diagnose, repair, and info on symptoms and causes of a P2271 code that indicates a biased or stuck rich signal from the second bank 1 oxygen sensor.

What Does The P2271 Code Mean? This P2271 diagnostic trouble code (DTC) refers to the post-catalytic converter O2 (oxygen) sensor on bank #1, sensor #2. This post-cat sensor is used for …