PCMTuner USB Not Working After Update PCMFlash 1.2.5 by Mistake?

Only PCMtuner software can be updated online for free. Don’t update PCM Flash version.  PCMTuner released continuously update online, current version goes to V1.2.5 (April 2022). PCM-Flash software is V1.20.

If you update pcm flash software by mistake, the dongle will stop communication and throw an error USB not accessible.

Pcmtuner 1.2.5

Pcmtuner Flash 1 2 0

NEVER update PCMFLASH.  Remove complete from pc and reinstall software.

But the pcmtuner hardware won’t be locked. 

How to fix if update pcmflash by mistake?

  • Delete current pcm flash ONLY.
  • Install pcm-flash app here (disable anti-virus program)


  • Run pcm flash on the desktop and read/write ECU

Pcmtuner License 1

Pcmtuner License 2