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Fluctuating Mpg display

Tiny
THECOINBOX
  • MEMBER
  • 2008 FORD FOCUS
  • FWD
  • AUTOMATIC
My 2008 Ford Focus has a digital miles per gallon readout. Lately the display has begun to fluctuate wildly.

On average the display used to read 29-34 mpg and it was fun to maintain the highest mpg possible. Now it drops 2-4 mpg (measured in tenths) within a few city blocks, regains the 2-4 and drops again. Just sitting at a traffic light, it may drop or even rise. It's become so unreliable that I've turned off the display.

The car has 48k miles and runs like a charm.
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Tuesday, March 8th, 2011 AT 2:13 PM

2 Replies

Tiny
BUTCH SHULL
  • MEMBER
  • 34 POSTS
Sounds like the mpg module has an internal concern. Would need to be tested for dtcs or module configuration concern which means going to the dealer.
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Wednesday, March 9th, 2011 AT 1:50 AM
Tiny
THECOINBOX
  • MEMBER
  • 2 POSTS
Appreciate your advice. I've looked all over the 'net looking for information on this module but no luck. What component do I need to replace?
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Wednesday, March 9th, 2011 AT 9:53 PM

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