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WI Huck
May 13th, 2009, 12:08 AM
Hello and thanks for the help so far! I have the RR working but I have this P0601 hard code that keeps the check engine light on. I know how to get rid of it, but I wanted to know if this is a quirk with the RR ECM or if there is a problem with the ECM I have.

Thanks!

Mark

GMPX
May 13th, 2009, 09:41 AM
Mark, it sort of rings a bell as a common issue with the RR ECM in the Duramax, but honestly I don't remember. Is it causing any problems apart from the annoying MIL?

Cheers,
Ross

WI Huck
May 14th, 2009, 01:48 PM
Not that I can tell. I will change it to not reported and see how it goes.

GMPX
May 14th, 2009, 10:23 PM
I have a feeling it's because it cannot save any learn data back to the flash memory on shutdown as a normal ECM would, but as the Road Runner does not have real flash memory it will never be able to do it, hence the DTC sets.

GMC-2002-Dmax
May 16th, 2009, 09:55 AM
I have had my RR for over 3 years.

That code is always present, no matter what.

Just shut the MIL down and ignore it.

:)

WI Huck
May 18th, 2009, 11:57 PM
Thank you.

sweetdiesel
July 23rd, 2009, 01:51 AM
Ya thankyou also