P2271 is a diagnostic trouble code (DTC) for "O2 Sensor Sign

pkarlsona-3fab · Sep 10, 2020

Hello All,

I have changed the bank 1 sensor 2 O2 sensor and the code came back within the week. I warrantied the sensor and after a week it came back again. There are no exhaust leaks that I can see. I used a Bosch Exact Fit / Oxygen Sensor from AutoZone. Anyone had the same issue? What was the problem? Should I go with a factory sensor?

Thanks for the input.

RedSLEd · Sep 10, 2020

I can't say whether it would cure the issue, but most folks say it's better to use OEM sensors on these trucks. Have you tried cleaning the MAF?

pkarlsona-3fab · Sep 14, 2020

The truck was due for an oil change today. I read the codes and there is now a P013A O2 Sensor Slow Response - Rich to Lean (Bank 1 Sensor 2) code. I cleaned the MAP sensor and will be replacing the sensor with an OEM sensor once they open up at 9 with their banker hours lol.

chem_man · Sep 14, 2020

If they don't have an ACDelco one in stock, then get a Denso O2 sensor instead.

P2271 is a diagnostic trouble code (DTC) for "O2 Sensor Sign

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