PCM code? - Diesel Forum

hammer101 · 07-16-2009, 10:04 PM

If I have my truck serviced by a dealer and he flashes the pcm will it change the pcm code and if so would it cause DP-Tuners F-6 chip not to work afterward.

**SmokeyWren** · 07-16-2009, 10:56 PM

Quote:

Originally Posted by hammer101

If I have my truck serviced by a dealer and he flashes the pcm will it change the pcm code ...

Yes.

Quote:

...and if so would it cause DP-Tuners F-6 chip not to work afterward.

Maybe. Call or e-mail Jody with your old and new PCM codes and he'll know if you need to download a different version of your tunes. Your tech should have noted the new PCM code on both your receipt for the work done and the truck - maybe on the air cleaner housing.

JimTJr · 07-17-2009, 07:47 AM

What flash would a 99 get that it already hasn't had? (And do you REALLY want it flashed? If you like it like it is, tell them not to mess with it....)

calico5string · 07-17-2009, 02:12 PM

Your tuner should still work even if the PCM is reflashed.

From some conversations I have had with Jody at DP-Tuner, it is the "Family" number (the DPC-) of PCM that is more important than the actual PCM "code". The PCM "code" is sort of the version of factory-tune that is installed in the PCM. The "family" (or model number, if you will) of the PCM does not necessarily change with a different "code" (or tune). Does that make sense?

Again, your PCM's "family" number (DPC number) will be the same, only the factory tune (code number) will change with a reflash. And since the tuner's programming basically overrides the factory (PCM) programming anyway, you should be fine.

Here's a pic of the different numbers:

I used to have a list of DPC numbers and all of the "code" numbers for each, but I can't seem to find it. If I do, I will post it up.

If your chip was installed when the dealer did the re-flash, that may have damaged the chip...not good!

If the chip was not installed when they did the flash, and you re-installed it afterwards, then I would suggest you go back and double-check the edge-card connection where the chip plugs in the the PCM. Make sure the connector is clean and the chip is fully seated on the connector. That is the most common cause for a chip to stop working.

Good luck. Let us know what you find...

calico5string · 07-20-2009, 01:26 PM

Quote:

Originally Posted by calico5string

Your tuner should still work even if the PCM is reflashed.

Here's a pic of the different numbers:

I used to have a list of DPC numbers and all of the "code" numbers for each, but I can't seem to find it. If I do, I will post it up.

I found it!!

Here is the list of PCM "Family Codes" (Models) and "PCM Codes":

PCM Codes (Click ME!)