Day Trip MPG malfunction - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Jrider · 06-24-2016, 12:33 AM

So recently I noticed that the Trip MPG indicator is malfunctioning, it reads from 0-127 mpg up and down, all around. It never stays the way it used to. I understand that it will reach a high number and gradually go down, but this is all over the place. Has anyone else noticed this or had this problem?

The standard average MPG indicator is functioning normally.

I recently installed a Perrin CAI. Not sure if it was on the fritz prior to this.

chaoskaze · 06-24-2016, 12:50 AM

? That sounds normal. It read the instant how much u are steping on the gas.

if your foot isn't even on it it's gonna be into 100x.

kuangxtc · 06-24-2016, 04:01 PM

Yeah that's what it's supposed to do. It's an instant MPG reading, so if your foot is completely off the accelerator and you are going at a sufficient speed it will read 127 MPG. Likewise, if you are accelerating hard, your MPG reading will be very low, and if you are on a flat highway with cruise control you can expect the instant MPG to be relatively constant, will jump around a bit depending on incline/declines of the road.

Tcoat · 06-24-2016, 05:07 PM

Two threads to ask the same question?

iamjacob · 06-24-2016, 05:47 PM

I'm guessing the other thread told him that he's on the instant MPG and not the average MPG?

Press the MPG button a few times to cycle around to the other reading.

Packofcrows · 06-25-2016, 01:56 AM

Unplug the battery and re-plug it back in.

Jrider · 06-26-2016, 01:14 AM

To answer all the above:

Since I am new to the thread I wasn't sure where to post the question. Like I stated in the original question, the average MPG is functioning normal. so by that logic I had already cycled through the options. I thought the question I asked was clear and to the point.

I disconnected the battery before I reached out to ask the question.

In the other thread I basically stated that I was wrong and I must have been expecting something to be going haywire since I had installed the CAI. I thanked everyone for their input. And now I will thank you for your input.

06-24-2016, 12:33 AM	#1
Jrider Member Join Date: Jun 2016 Drives: 2013 Silver BRZ Location: Central Coast, CA Posts: 17 Thanks: 3 Thanked 0 Times in 0 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Day Trip MPG malfunction So recently I noticed that the Trip MPG indicator is malfunctioning, it reads from 0-127 mpg up and down, all around. It never stays the way it used to. I understand that it will reach a high number and gradually go down, but this is all over the place. Has anyone else noticed this or had this problem? The standard average MPG indicator is functioning normally. I recently installed a Perrin CAI. Not sure if it was on the fritz prior to this.

06-24-2016, 05:07 PM	#4
Tcoat Senior Member Join Date: Jul 2014 Drives: 2020 Hakone Location: London, Ont Posts: 69,841 Thanks: 61,656 Thanked 108,295 Times in 46,456 Posts Mentioned: 2499 Post(s) Tagged: 50 Thread(s)	Two threads to ask the same question? __________________ Racecar spelled backwards is Racecar, because Racecar.

06-25-2016, 01:56 AM	#6
Packofcrows hey you, yeah you <3 Join Date: Jul 2012 Drives: 2014 37J FR-S Location: Monterey County, CA Posts: 2,715 Thanks: 905 Thanked 1,259 Times in 809 Posts Mentioned: 38 Post(s) Tagged: 3 Thread(s)	Unplug the battery and re-plug it back in. __________________ Got my TRD wheels and TRD louvers. Thanks!!!

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06-24-2016, 12:50 AM	#2
chaoskaze The Fail Boat Join Date: Aug 2011 Drives: CWP S.B. Location: LasVegas Posts: 3,028 Thanks: 4,720 Thanked 1,294 Times in 874 Posts Mentioned: 19 Post(s) Tagged: 0 Thread(s)	? That sounds normal. It read the instant how much u are steping on the gas. if your foot isn't even on it it's gonna be into 100x.

06-24-2016, 04:01 PM	#3
kuangxtc Member Join Date: Jun 2016 Drives: 2013 DGM BRZ Limited Location: Oregon Posts: 21 Thanks: 3 Thanked 2 Times in 2 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Yeah that's what it's supposed to do. It's an instant MPG reading, so if your foot is completely off the accelerator and you are going at a sufficient speed it will read 127 MPG. Likewise, if you are accelerating hard, your MPG reading will be very low, and if you are on a flat highway with cruise control you can expect the instant MPG to be relatively constant, will jump around a bit depending on incline/declines of the road.

06-24-2016, 05:47 PM	#5
iamjacob insert witty quip here Join Date: Mar 2016 Drives: 2016 Limited BRZ Location: Stockton CA Posts: 255 Thanks: 52 Thanked 193 Times in 103 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	I'm guessing the other thread told him that he's on the instant MPG and not the average MPG? Press the MPG button a few times to cycle around to the other reading.

06-26-2016, 01:14 AM	#7
Jrider Member Join Date: Jun 2016 Drives: 2013 Silver BRZ Location: Central Coast, CA Posts: 17 Thanks: 3 Thanked 0 Times in 0 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	To answer all the above: Since I am new to the thread I wasn't sure where to post the question. Like I stated in the original question, the average MPG is functioning normal. so by that logic I had already cycled through the options. I thought the question I asked was clear and to the point. I disconnected the battery before I reached out to ask the question. In the other thread I basically stated that I was wrong and I must have been expecting something to be going haywire since I had installed the CAI. I thanked everyone for their input. And now I will thank you for your input.

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