PCM Hammer 2 Preview

[antus]

Note that the 2.00 preview release does have some bugs and will allow you to write bad files to your P04 resulting in a soft brick. Since 2.00-preview was created we learnt there are many incomplete p04 binaries in the wild that we needed to add more tests to detect and block. I recommend to delete it that version and get the latest from github. At the moment the latest is here: https://github.com/PcmHammer/PcmHammer/ ... 8625170917

You need to be logged in to github to see the download link at the bottom right hand corner of the page. If you are not logged in you can see everything, just the link is missing.

If you flash a bad file with the and older version of 2.00-preview you will likely need BDM to recover your PCM.

I have removed the 2.00-preview download and put some instructions for downloading the latest from github in the first post.

[zack4200]

If you flash a bad file with the and older version of 2.00-preview you will likely need BDM to recover your PCM.

They can be fixed with PCMHammer, I accidentally flashed one of the bad p04 bins ~2 years ago and Gampy helped me get it sorted out. Gonna shoot you a PM.

[antus]

Was it as simple as setting a manual key of FFFF ?

[Kdog]

?!? or 0000

[Kdog]

Fixed mine without

[sparepartsblazer]

Tried to read a 09356249, OSID 12221087 that I had laying around.

Code: Select all

[06:40:08:193]  PCM Hammer (11/19/2025, 3:45 PM)
[06:40:08:203]  Monday, December 01 2025 @06:40:08:20
[06:40:08:662]  Thanks for using PCM Hammer.
[06:40:09:222]  Device Found: OBDX Pro GT
[06:40:09:424]  Voltage is: 12.05V
[06:40:09:432]  Device Successfully Initialized and Ready
[06:40:11:264]  VIN: 1G1JC1245Y7117344
[06:40:11:286]  OSID: 12221087
[06:40:11:298]  Description: P04 Service No 9380717
[06:40:11:317]  Calibration ID: 12221083
[06:40:11:339]  Hardware ID: 16268310
[06:40:11:405]  Serial Number: 3W0RX29174
[06:40:11:424]  MEC: 0
[06:40:11:447]  Voltage: 12
[06:40:22:422]  Will save to C:\Users\Brian\Desktop\aa.bin
[06:40:32:428]  Querying operating system of current PCM.
[06:40:32:451]  OSID: 12221087
[06:40:32:453]  Description: P04 Service No 9380717
[06:40:32:518]  The PCM didn't accept the unlock key value
[06:40:35:524]  Unable to process unlock response.
[06:40:35:526]  Unlock was not successful.

[antus]

What year and what is the original application of the PCM? That OSID might need to be moved to another group. Do you know what size the flash chip will be? If not, once the key is right at least pcmhammer will be able to upload the kernel and read the flash ID and tell you.

[sparepartsblazer]

According to the VIN 2000 Chevy Cavalier 2.2. That is all the info I have

[antus]

ok so that would mean its a 4 cyl not 6, so its a p08 not a p04. Ill move that osid and let you know when ready soon.

[sparepartsblazer]

Yes 4 cylinder