I have Error code p2271, I bought the correct Bosch #13355 sensor for Bank-1, Sensor-2, but not sure where this little guy is. Last week I had the dealer fix an error code P2238 Bank-1 Sensor-1, and had sensor replaced. (That error code was on for about a year.) Right before the dealer replaced this, my idle dropped to a semi-rough 500 RPM. Immediately after replacement of Bank-1 Sensor-1, it dropped to 300 RPM, stalling at every stop. Not sure why the 2nd code (P2271) showed up after the dealer replaced the pre-cat sensor. I also ordered some new spark plugs. Sadly current ones are original and the engine has 150K on it. Kind of hoping that is really the problem... None-the-less, I still need to know where Bank-1 Sensor-2 is.
Thank you in advance!
Joe
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The code description is O2 sensor stuck (biased ) rich, which would be a high voltage bank #1 sensor 2 as you correctly identified. It's noteworthy however that this code isn't listed for your vehicle in service information. Bank#1 is the passengers side (right hand) and the down stream sensor is after the catalyst near the transmission on the passengers side.
Thank you for your response. I will look where you said to.
Does the low idle/stalling make sense to be related to these two O2 sensors. The dealer said give the system awhile to monitor and adjust to driving habits, but, I didn't think it would of dropped from 550 to 300-0 RPM.
Kind regards,
Joe
Thank you for your response. I will look where you said to. Does the low idle/stalling make sense to be related to these two O2 sensors. The dealer said give the system awhile to monitor and adjust to driving habits, but, I didn't think it would of dropped from 550 to 300-0 RPM. Kind regards, Joe