This code means that the second oxygen sensor (Sensor 2), located after the catalytic converter on Bank 1, is stuck showing a rich mixture (too much fuel). The signal is not changing as expected.
Main possible causes:
Driver may notice the following:
Use an OBD2 scanner to read the code. Then check:
This error is quite common on high-mileage Chevrolet vehicles (over 150,000 km). Often seen on Cruze, Malibu, Equinox, Silverado, etc.
This is not critical, but it can lead to high fuel usage and damage the catalytic converter if ignored. It can also cause the car to fail emissions tests.
Replace the sensor if it's faulty. Repair or replace damaged wires. Fix any exhaust leaks. After the repair, clear the code and check the system again with a scanner.
Error P2271 means the post-catalyst oxygen sensor (Bank 1 Sensor 2) is stuck in a rich condition. It is often caused by a bad sensor or an exhaust leak. Fixing it helps save fuel and protect your catalytic converter.
The page presents a in-depth analysis of code P2271 for Opel, Renault, VW (Volkswagen), Ford, Peugeot, Mitsubishi, Skoda, BMW, Citroën, Toyota, Lada, Honda, Kia, and other models to investigate potential reasons and solutions related to obd-ii errors, with main attention on the issue. We offer engineering documentation and methods for diagnostics to identify and clarify the matter effectively. Our goal is to become a complete resource offering information on issues related to OBD-2 errors and to provide you with the tools needed for successful repair and maintenance of your vehicle. If during the repair of OBD2 codes you need to purchase parts, don’t forget to visit Avtopro!
