I just replaced it since the MIL code read 21 "upstream O2 sensor..." How do I know if it fixed the problem or how do I reset the code?
O2 Sensor
Sep 02, 2004
5 Replies
Mel P. did pass the time by typing:
The code should go away. You can reset by disconnecting the battery for a few minutes.
Clearing the codes consists of nothing more than disconnecting the battery for 1-2 minutes.
Jerry
If the O2 Sensor fixed the problem, the code will reset itself.
Thanks guys... I replaced the sensor and the error cleared itself a day later.
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