asicking

I have the same question for the same vehicle today. Anybody have any guidance? Thanks.

My car had 250K+ miles on it BEFORE I tweaked it. It was getting fuel efficiency in the 40s when I traded it in with 380K miles. I don’t hypermile but I am mindful. Maybe that’s the difference.

These numbers, in the 30s are very surprising to me. My 2010 hybrid dropped to the mid-30s BEFORE I applied the fix about 2 years ago then jumped to low 40s for the almost 75k miles I drove following the fix.

What!? Holy cow!

2010 hybrid -- just clicked over to 374K miles

JAlexs, I have 369K miles on my 2010 FFH. It has been 412 days and almost 57K miles since I applied “the fix”. My mpg over those miles is 42.2. During extreme heat or cold it dips to 37 to 40, and during spring and autumn it ranges from 41 to 48. I’m thinking of replacing it eventually with another, hopefully with around 100K miles.

I’d have it tested. My 2010 has almost 360K miles and I’m getting almost 43mpg long term average.

Refer to owners manual for details but it’s a simple matter of pressing the info button on the left hand side of steering wheel repeatedly until mpg is selected and then press the reset button that is adjacent to the info button

OK...that's a start. But keep in mind that when you first reset it, the number will fluctuate wildly with every start, stop, acceleration...the number is almost meaningless until you've driven significant miles. And even then you can see dramatic differences. For example, when I jump on the highway with no traffic and cruise 20 miles at 70 mph, I get something in the mid-30s, or less if the A/C is on. On the other hand, on a nice spring day like today with no heat or A/C and driving on rural roads without much stop and go, I'll easily get 50 to 55 mpg for 20 miles.

Reset the MPG and watch it after several trips. Or, do like me and record odometer and gallons used at every fill up and do the math. I do a lot of business travel so I keep these records for tax purposes.

Yikes! Sounds like your car either has something else wrong with it or the “fix” wasn’t actually completed. My 300K+ miles 2010 went from mid-30s to low 40s immediately when I completed the change last August.

Yikes! Sounds like your car either has something else wrong With it or the “fix” wasn’t actually completed. My 300K+ miles 2010 went from mid-30s to low 40s immediately when I completed the change last August.

I too am enjoying the results of this "fix". After 9 months and almost 40K miles I'm getting consistent mpg in the low 40s. And the car had over 300K when the fix was applied. I'm not a car nut, but getting 40+ mpg on a nearly 10 year old car with 350K miles seems pretty remarkable.

The TSB number mirak was asking about is 20-2142