Thread: Downpipe and O2 Test delete in HP tuners.

In order to eliminate cat diagnostics you have to set certain codes to report but not set the MIL iirc. It’s been a few years since I messed with it.

hpt cant turn off the cat test. no matter what your codes are set to.


you can dl old hpt find a bin from dhp then alter its vin# to yours. then kill the cat test with tiny tuner. then load and flash it with the old hpt. Change Vin / Serial Number of Bin File

dhp and hp depository where to find a bin . old hpt tuner software is in the drop box there too.