I get this code when my Superchips Flashpaq is programmed in Performance, Economy, or Tow Safe mode. Sometimes extremely hard to clear, but always comes back either immediately or after a short bit of driving. Truck seems to drive fine, no symptoms other than the code.

If I reprogram to Stock, it doesn't happen.

Any ideas? ('03 F350 6.0 Powerstroke)

 

Your tuner is probably taking control of the IPR causing the PCM to see a fault.

 

I took a long (several hundred miles) trip this weekend and ran through all 4 modes (Stock, Tow Safe, Economy, and Performance). Stock is the only one that doesn't throw the code. In addition, I noticed on the last test (Tow Safe) that the truck showed a P1000 (more driving needed) in ADDITION to the P2623 even after a 200+ mile span of start/stop/highway speeds/idle/city driving mix. So I reinstalled the Stock programming and am at the point of returning my Flashpaq to Superchips.

I wonder if the factory flash in my truck (very recent) is incompatible with current Flashpaq tuning?

FYI, my existing stock Engine & Transmission
calibration codes according to the Flashpaq are:

Engine VXAP1N6
Transmission TQAT0NA

 

I'm sure that alot of people are going to disagree with me when I say that the best tuner, is no tuner at all!

 

I'm with you canadaguy---I've been shot at before