New oxygen sensors = lower MPG??
#1
New oxygen sensors = lower MPG??
My 2002 has 107K miles, SES light came on. Dealership said it needs new oxygen sensors. Got them replaced, dealership "reprogrammed" the engine control module, and now mileage on highway has dropped from 35mpg to 28-29mpg. Nothing else changed.
Any ideas what the problem or the fix is, before I go back to the dealership?
Any ideas what the problem or the fix is, before I go back to the dealership?
#4
are you getting 35mpg according to your digital readout on your trip gauges or are you actually figuring it up exact. my trip gauge always gives me mpg numbers that i know im not getting.
#5
Originally Posted by oldskooljdm
are you getting 35mpg according to your digital readout on your trip gauges or are you actually figuring it up exact. my trip gauge always gives me mpg numbers that i know im not getting.
In reality, it was about 25 mpg, and I was averaging about 80 mph. I don't really know how that guage is supposed to work, all I know is that it doesn't.
#6
Originally Posted by oldskooljdm
are you getting 35mpg according to your digital readout on your trip gauges or are you actually figuring it up exact. my trip gauge always gives me mpg numbers that i know im not getting.
#8
I would say the drop to 28MPG is nothing to complain about (although from 35MPG I would). I'm not exactly sure if the "reprogramming" of the o2 sensor was neccessary, though. I believe it's just a plug and drive off situation for o2's.
#9
Originally Posted by Love_00_Max
I must say 35MPG is great but pretty hard to believe.
I know of no V6 giving 35MPG on highways!!!
I know of no V6 giving 35MPG on highways!!!
I'm going to agree here.
OP: Did you reset the ECU, or at least disconnect the battery for a bit?
#11
2002 maximas dont get 35 mpg on the highway. I have an 03 and its also a manual and no matter what speed i get I still avg between 24 to 27 mpg roughly. Its reset with each new fill. If you fill it with regular you'll get more...unfortunately I pay top $$$ for fuel so my car hasnt seen regular before.
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220k+ A32
5th Generation Maxima (2000-2003)
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09-22-2015 03:08 PM