Speedo MPG reader stuck on 38 - Civinfo
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post #1 of 13 (permalink) Old 31st January 2019, 01:30 Thread Starter
 
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MPG reader stuck on 38

So I've noticed my avg mpg reading doesn't go above 38, It sort of hovers between 37.5 - 38.6. The vehicle is a 2008 2.2 EX model. I have tried various driving styles like driving around town 30mph to motorway driving 70-80mph but there is no movement. My avg speed doesn't seem to change either, it is stuck on 17mph even after a long motorway drive. What could be causing this issue. Thanks
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post #2 of 13 (permalink) Old 31st January 2019, 04:07
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It probably needs resetting.

You need to reset both the A and B trip displays within a set period of seconds and that resets the average.
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post #3 of 13 (permalink) Old 31st January 2019, 10:25 Thread Starter
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So everytime I start the car I need to reset the trip computer? I'm coming from a VAG car and it used to do it automatically
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post #4 of 13 (permalink) Old 31st January 2019, 10:42
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No you wont need to do it every time you drive the car. If that fails try disconnecting the battery and it should do a hard reset.
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post #5 of 13 (permalink) Old 31st January 2019, 11:10
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i have mine set so trip 'A' resets every time i put fuel in
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post #6 of 13 (permalink) Old 31st January 2019, 11:20
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So do I. That's the way to do it. I also have trip B set to Manual. I think that you can set it to reset on every startup as well.
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post #7 of 13 (permalink) Old 31st January 2019, 11:43
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Yes vag cars reset trip a after a few hours after ign is off

My Mazda resets trip a every time car starts

Honda is manual reset so trip a for is each tank of fuel and trip b is since I had the car
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post #8 of 13 (permalink) Old 31st January 2019, 12:57
 
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Trip b will be since the last battery unpluging. It resets your mileage. Any maintenance is usually preceded by one of those. The most you're going to get with some reliability will be the yearly maintenance period.
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post #9 of 13 (permalink) Old 31st January 2019, 13:39
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.... or if you have manually reset trip B (or A) which is easy to do.

I use trip A for recording trip info = manual reset when required and trip B reset with a refuel to monitor 'real' mpg.
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post #10 of 13 (permalink) Old 31st January 2019, 16:21
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If OP has never reset the trip, then the MPG will stay pretty constant as the readout will be from whenever it was reset.
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post #11 of 13 (permalink) Old 31st January 2019, 16:50
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Exactly
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post #12 of 13 (permalink) Old 1st February 2019, 00:42 Thread Starter
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Thanks this I didn't know. So to reset I do that through the reset button on the steering wheel. To go further into the system do I do that through the mode button?
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post #13 of 13 (permalink) Old 1st February 2019, 04:49
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Ignore my A and B reset within seconds post. That's to reset the average speed.

The trips each work independently and can be reset manually or automatically depending on your settings.
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