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Dodge Dakota
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3/14/2007
11:19:50
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 Subject: P0420
IP: Logged
Message:
I have been noticing a drop in my gas mileage use to be 16 to 17 MPG now 12MPG at first there was no check engine light. Now everytime I use my OBD II reader to turn off the light. It comes back on only if i am going down the highway., If i am driving under 45mph the light never on. As soon as i am at highway speeds the light comes on. any ideas. I am thinking an O2, maybe my cat. is going since my cat. has 180,000 miles on it.
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