OBD2 All-In-One USB v2.1 and then reprogram the controller

and then reprogram the controller with your modifications

and malfunction trouble code reading and clearing (including freeze-frame data)

TunerProRT 5 is a free

This is a trimmed-down version of our MEFI Scan & TuneTM system for the user that just wants to do scanning / monitoring

This is the Gray connector J3 on the MEFI 5 and E67 controllers

OBD2 All-In-One USB v2.1 and then reprogram the controllerELM Electronics, the inventor and maker of the ELM327 chip closed its doors in mid 2023. There is no longer a supply of new ELM327 chips. ELM327 compatible scan tools on the market are using knock offs or clones of the original ELM327 chip, which may or may not be fully ELM327 compatible. We have a very limited supply of original ELM327 chips of prior versions, that are available below. When they're gone, they're gone!