What is the fault code P2271? What is O2 Sensor signal stuck / unstable rich (Bank 1 Sensor 2) failure? How do you fix the P2271 fault code What are the symptoms and causes for the P2271 error code?
What is the P2271 Fault code? What does it all mean?
A code P2271 means that there is a problem with the oxygen sensor (O2) bank 1, sensor 2. This sensor monitors catalytic converter performance. The converter’s task is to reduce exhaust emissions. In the code description, “Bank 1” refers at the engine bank containing the engine cylinder 1; “Bank 2” refers downstream to the catalytic converter’s O2 sensor. This code is set when the powertrain controller module (PCM), receives an O2 sensor signal indicating an incorrect catalytic converter air-fuel ratio. The O2 sensor signals that the converter is not supplying enough air and that the engine is running well.
The P2271 fault code can affect vehicles of all makes and models, including but not limited to: Volkswagen, BMW, Chevrolet. Dodge, Hyundai, Peugeot. Suzuki. Audi. Porsche. Smart. Honda. Toyota. Subaru. Acura.
Note: The vehicle manufacturer may have a different definition of P2271. The code definition can be found in the vehicle’s manual or repair database. A third sensor may be installed on some vehicles that could malfunction and cause the PCM not to store a P2275 code.
What causes the P2271 Fault code?
Here are some reasons why P2271 should be set.
- – Defective oxygen sensor (Bank 1 Sensor 2)
- – O2 sensor contaminated by engine coolant or exhaust leaks
- – Damaged, corroded wires. Open or shorted circuits. Or loose, rusty connections to the oxygen sensor.
- Problems with fuel pressure
- – Leakage or defect in fuel injectors
- – A damaged, defective or clogged catalytic convertor
- – Defective purge solenoid valve
- – The PCM is failing or requires a new software update
What are the symptoms for P2271 Trouble Code?
These symptoms may be present if you own a vehicle that has the code 2271
- – Illumination at the check engine lights
- – Low engine performance
- – Increased fuel use
- – Vehicle needs to be worked hard
How do I fix the P2271 fault code?
There are several repairs that can resolve the P2271 fault code.
- – Replacing a defective oxygen sensor (Bank 1 Sens 2)
- Repair of damaged wires to the oxygen sensor, and replacement of worn or rusty connectors
- – Repairing leaks and checking the exhaust system
- – Repairing or cleaning faulty or blocked fuel injectors
- – PCM replacement (rarely)
