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20/08/2022 10:10 am
Topic starter
I have a 2008 Nissan Sentra 160,000 miles 2.0L I had a problem with my A/F sensor Aka sensor 1 and i replaced it since the voltage was out of rAnge while checking both sensor 1 and sensor 2 on the scan tool I know that sensor 2 which is after the catalytic has to move up and down between .1 to .9 volts but it wouldn’t do that I just replaced the A/F sensor and left the other sensor alone what problems could this cause? Do I get less gas mileage? Do I get black smoke on my tailpipe??
2 Answers
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20/08/2022 11:31 am
the downstream O2 sensor shouldn't fluctuate between .1 to .9 volts if the cat is working right.
1
20/08/2022 1:09 pm
sensor 2 which is after the catalytic has to move up and down
Jack is right. You got it backwards.
