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U0301 - ECM/PCM mismatch

Posted: Sat Sep 29, 2018 2:24 pm
by samuelt1995
Hi,

I recently purchase a Flashpro for my civic 2016 turbo.

I flash the computer and then a got a check engine. I looked for the code and I saw U0301 and I'm unable to erase it. I looked on the internet and I see it is a mismatch computer.

I try to flashback to stock ECU and it still showing that error code.

My ECU number is 37820-5AA-C66

I bought my car in Canada

Please help me.

Thank you,

Samuel

Re: U0301 - ECM/PCM mismatch

Posted: Sat Sep 29, 2018 4:52 pm
by Hondata
The error is because the ECU probably has been flashed by the Honda dealer to 2017 to match the TCM.

What calibration did you load? The 2016?

Re: U0301 - ECM/PCM mismatch

Posted: Sun Sep 30, 2018 4:45 pm
by samuelt1995
Hi,

You are right. Honda had to flash my computer one day because the car rpm varies on the highway.
I first flash with the +6 psi first. Now I back to stock ECU. So you think flashing with 2017 will solve my problem. If so, how can i do it? And if I want to go back to stock ECU, how do I do that?

Thanks,

Re: U0301 - ECM/PCM mismatch

Posted: Sun Sep 30, 2018 7:23 pm
by samuelt1995
Hondata wrote: Sat Sep 29, 2018 4:52 pm The error is because the ECU probably has been flashed bby the Honda dealer to 2017 to match the TCM.

What calibration did you load? The 2016?
I tried to use a 2017 Canada Touring one and it didn't want to flash. I tried many other, same thing.

I flashed on a 2016 one.

How can I flashed with a 2017 one?

Re: U0301 - ECM/PCM mismatch

Posted: Mon Oct 01, 2018 10:59 am
by Hondata
Can you use the 'support support information to Hondata' function from the help menu (with the FlashPro plugged in)?

Re: U0301 - ECM/PCM mismatch

Posted: Tue Oct 02, 2018 5:27 am
by samuelt1995
Hello,

I did a firmware update and I was abble to flash on +6 psi 2017. All the error code is gone.

Thank you so much.

Re: U0301 - ECM/PCM mismatch

Posted: Tue Oct 02, 2018 7:08 am
by Hondata
Ok, glad it is sorted out.

Re: U0301 - ECM/PCM mismatch

Posted: Thu Jan 21, 2021 6:41 pm
by neodragons
Hondata wrote: Tue Oct 02, 2018 7:08 am Ok, glad it is sorted out.
hello, i am also having this same problem. but with the recent update of hondata. its says i cant up load the 2017 or 2018 cvt tune to a 2016. please advise

Re: U0301 - ECM/PCM mismatch

Posted: Thu Jan 21, 2021 7:09 pm
by neodragons
to add, i was able to do this before on 3.5 i think, but once it updateed to 3.7 it no longer let me upload the 2017 tune

Re: U0301 - ECM/PCM mismatch

Posted: Thu Jan 21, 2021 9:13 pm
by Hondata
Our crystal ball is broken - please some details.

Re: U0301 - ECM/PCM mismatch

Posted: Sun Jan 24, 2021 1:21 am
by neodragons
nevermind, went for a drive after uploading the base map and check engine light went away.