Diesel Tuner Pros
Invalid product code, mini max
Trying to install download and get invalid product code , then have to unplug unit to clear.
Purchased new, used? Vehicle type and year? The more info you provide the better I can assist.
New head unit full dpf codes for most models, tried on 2011 duramax failed at "install downloads", tells me to turn key off then on, does quick 5 second download then screen says invalid product code... also tried on 2011 ford 6.7 and fails at transmission tune. Will use on the ford if I can make this work.
I would call whoever you bought it from and tell them to get you another tuner. Sounds like that one they sent is broken. I have heard different folks saying that they have purchased tuners and they not work. Something about them being sent out with bad SD cards.
New tuner installed and work great, thanks. Now to figure out why no exhaust brake after tune installed.
Some say the exhaust brake quits working for a while after installing the tune then just starts working fine after awhile. Others report that it never works. I don't believe there was ever a resolution when H&S was open. Since they have been closed for 5 years there are no new tuning modifications.