BAD GAS MILEAGE AFTER NEW OXYGEN SENSOR

1997 Acura CL

Tiny

aaronacura

January, 27, 2012 AT 5:32 PM

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

FOUND 3465 RELATED QUESTIONS

1 Answer

Tiny

rasmataz

January, 27, 2012 AT 6:22 PM

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

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