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Sudden drop in MPG, 2011 Jetta


 
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Sudden drop in MPG, 2011 Jetta
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msegalla



Joined: 18 Oct 2016
Posts: 1



Post Sudden drop in MPG, 2011 Jetta Reply with quote
Two months ago I was forced to replace my car radio due to its death (thanks VW for the lack of recall). I own a 2011 2.5 SE Jetta. I pulled the incorrect fuse in the fusebox located under the hood in order to try and disconnect the radio, and I THINK I removed the ECU fuse by mistake. I was about to turn the car over (frankly can't remember if I did turn it over, but I don't think it can start without the ECU) but received nearly every warning light possible, so immediately switched the key off and placed the fuse in the proper place. All warning lights disappeared, no audible change in the car's running, but since then my mileage has been terrible. I used to get ~33 mpg through primarily highway driving, now I'm getting ~24-25 consistently, regardless of the gas station I get my gas from.

Even if the ECU was reset shouldn't it have re-adjusted by now? Is there a possibility it's something completely unrelated to the fuse removal?
Thanks for any help.
Tue Oct 18, 2016 12:21 am View user's profile Send private message
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