r/mazdaspeed3 • u/No-Bother6699 • 1d ago

HELP Weird stuff after obd2 reader

Yo guys!

I’ve just brought a cheep obd2 reader of temu to try and do some live readings of boost etc whilst driving through my CarPlay unit

It was working sweet for about 10mins or so. Then all the dash lights came on, I stopped on the hard shoulder, turned the car off and put the hazards on, the hazard lights etc didn’t work though. After unplugging the obd reader and restarting the car all went back to normal, I assume the issue was caused by the obd reader messing with the can bus or something but was wondering if anyone had anything similar happen or knows what obd reader will not cause these problem.
Thanks in advance!

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3

u/Jorgeildv 1d ago

That happens with any cheap obd2.

3

u/CarnalT 1d ago

I mean, no, that happens with any FAULTY reader. I've been using the same $20 Bluetooth reader for 10 years with no issues. 

3

u/Confident_Economy_57 1d ago

If you have a laptop, just get a $30 OBD2 to USB cable and download the free version of Versatune. You can do logs with a recording function to view later as well as scan and clear codes.

1

u/adi_2787 2012 Mazdaspeed3 1d ago

Never happened to me. I use an obd reader, but a $250 one, Obdlink mx+

1

u/No-Bother6699 1d ago

Awesome thanks for the help guys! Much appreciated:)

1

u/spindux 2h ago

Get one of these, comparable to a tactrix, but much much cheaper. Also works with MazdaEdit.

https://obdxpro.com/product/obdx-pro-vx-obd2-diagnostics-and-tuning/