Mechanics

BAD GAS MILEAGE AFTER NEW OXYGEN SENSOR

1997 Acura CL • 111,111 miles

Hello,

I had my bad OEM oxygen sensor (post CAT) replaced with a Denso oxygen sensor a few months ago. Prior to the new oxygen sensor, I was getting approximately 160-180 miles on half a tank (mix of city/highway driving). Since the new oxygen sensor I'm getting about 100-110 miles on half a tank.

It should be noted that my old O2 sensor was rusted on to the exhaust and the sensor itself was completely rusted through. I can only assume this means it wasn't working properly, if at all.

With the new sensor, the car has A LOT more power and is a lot more responsive, however it's absolutely destroying my gas mileage.

Do I have a bad O2 sensor? What's the deal?

Thanks,
Aaron
Avatar
Aaronacura
January 27, 2012.




View the Oxygen sensor's and coolant temperature sensor live data this will tell you something

Rasmataz
Jan 27, 2012.


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