This weekend I installed my GDE Eco Tune with their Code Reader tool--super easy and convenient and can now switch been Eco and Hot when needed.

Even though I had no CEL, I scanned for fault codes with the reader and got a "P1001".

I poked around here and found:
P1001/P1002 - Engine Off Timer Faults

...what exactly is this fault? Everything seems to be running great.

-p

_________________
2006 CRD w/99,300 miles
F31 from a previous life
EHM @ 42K, ProVent @ 79K
GDE Eco Tune & TCM @ 46K
Engine mounts replaced @ 55k/93k, Timing Belt @ 90k
Lift Pump @ 97k
OME Lift, 1.5''
Kenwood TM-V71 Ham Radio / Cobra C75WX CB
Surf Racks

The ECU performs diagnostic checks after turning the key off for 5-10 seconds prior to powering down. Sometimes the P1001 will be set if the unit is not powered long enough. It tends to be a random fault. Just use the flash tool to clear the code and it most likely will not return. In either case, it does not set a CEL and will not effect vehicle operation.

_________________
Providers of wholly developed aftermarket solutions for the KJ CRD.
(248) 977 - 9531

...aha. Thanks GDE!

_________________
2006 CRD w/99,300 miles
F31 from a previous life
EHM @ 42K, ProVent @ 79K
GDE Eco Tune & TCM @ 46K
Engine mounts replaced @ 55k/93k, Timing Belt @ 90k
Lift Pump @ 97k
OME Lift, 1.5''
Kenwood TM-V71 Ham Radio / Cobra C75WX CB
Surf Racks