I have a 2003 F250 4X4 PSD.

How do I reset the "Average MPG" caluclator?

I asked because I have doubts that it is functioning properly.

Example:
Zero load, high-way driving.... the display shows 14.4mpg.
Zero load, in-town driving... the display shows 14.mpg.
1,000 lbs in the truck, pulling 4,000 lbs on the high-way for 600 miles (each way)..... the display shows 14.2mpg.
and since I've returned from the trip mentioned above with the 5K of load, it has not changed from displaying 14.2mpg.... even though I am back to high-way driving with zero load... been through 6 -8 tanks of fuel.

My expectation is that when I am traveling without a load on the high-way that it should get the best MPG.
Subsequently, when I am pulling a load, utilizing the "Tow" function (without engaging O/D), that it would get worse MPG.

However, it appears there is vurtually no difference registered / displayed in MPG regardless of how I drive or what I tow.

Ideas?

Thanks in advance...

Cecil

 

I'm pretty sure it is calculating the average MPG since the last time it was reset, not the mileage at the instant you are looking at it You reset it by pushing both buttons at the same time while its on the MPG mode.

 

You might want to do it when you fill up, but select the average mpg setting, then push & hold bpth buttons in and it will reset from that moment.
As you drive you can watch it increase & decrease, and it will slowly settle as you drive, and then it will average all the miles driven until you re-set it again.
That' all there is to it.
Good luck.

 

Thanks Guys!

That's exactly what I was looking for!

 

Hi mine it's not reseting,it stays on 12.0mpg and when i push both it first show zone and then mpg but it won't clear.

 

Switch to MPG reading, then press and hold both buttons at the same time, it will reset, if you are hitting one or the other first it will cycle the display instead.

 

Finally did it thanks!!

 

Yeah, issue resolved.

 

Problem is now it shows 11.7mpg wao she's a Dieselaholic.

 

I reset mine from a stop in park and it goes to 0.00, then as soon as I start moving slowly it goes to 12.4, 33.3 then 99.9 within a few feet of movement...any idea what this is?

 

The gauge does not show the economy of what the truck is doing, It shows average MPG for the previous 500ish miles, So if you tow a heavy trailer for say 50 miles you should not expect a significant drop. Your economy for the 50 miles was down but averaged with the other 450 miles of normal economy the number wont drop a large amount. If you perform a reset, it is calculating fresh numbers so short term you will see unusual numbers i.e. if you reset going down hill it will temporally show a very big number (89 MPG wow) or at idle or going up a big hill low numbers (2 mpg need fuel quick) but soon the combined average of what the truck economy as been will produce a more normal number. Russ

 

I can’t get mine to reset...I push the 2 buttons on the overhead console and it goes to 0.0 and as soon as I move it goes back to 99.9 immediately