I got a check engine light last week. Hooked up the X3 and pulled the code P2272. Only code stored. OK, that is driver side downstream O2 sensor stuck lean. Checked for any obvious wiring or hose issues and found none so bought a new Bosch O2 sensor and installed it. Cleared the code and all seemed well for a few days. Today the CE light is back and same code....
It may have never really gone away just took a few drive cycles to come back.
Any suggestions on diagnosing this? I am running one of Torrie's tunes but as far as I know the secondary O2 sensors are not turned off. I also have an Accufab exhaust but the stock cats are in place.
Any suggestions or experience would be appreciated.
Thanks.
It may have never really gone away just took a few drive cycles to come back.
Any suggestions on diagnosing this? I am running one of Torrie's tunes but as far as I know the secondary O2 sensors are not turned off. I also have an Accufab exhaust but the stock cats are in place.
Any suggestions or experience would be appreciated.
Thanks.