Speed sensor replaced now bad mpg

SUSANDOLL198

MEMBER
2006 KIA SEDONA
AUTOMATIC
120,000 MILES

I had 2 speed sensors replaced. Before I was getting 18-24 mpg depending on in town or freeway driving. Immediately after getting the car back I was getting 11-13 mpg max. The mechanic said he didn't do anything that could have caused that and I don't have the money to get a new estimate. Any idea what would cause such a drastic drop in mpg? It's a 2006 Kia Sedona

Thursday, December 17th, 2015 AT 2:57 PM

1 Reply

ED-WEEZY21

MECHANIC
248 POSTS

Replacing speed sensors will have 0 affect on gas mileage. Gas mileage will never be the same and will change due to various reasons. The biggest reason is the winter time. Gas stations switch to a winter blend which causes lower gas mileage but is a necessity to prevent the fuel from freezing inside your car during freezing temperatures. Driving habits also affect gas mileage a lot. Make sure your tires are properly inflated at all times. With the constant changing in temperature, air pressure keeps rising and dropping affecting vehicle tire pressures. All this info is based on if you live in an area that actually experiences winter unlike places like florida.

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