I have been having this problem for a few months now. Engine throws a code, but nothing is recorded in memory. If I clear the code, everything is fine for a day or two and then it throws a code again with the same results - no code in memeory. Truck runs fine with no change in perfomance, etc...

I have the factory tune in the truck now and have been running this for the last few months with the same results. I actually got a knock sensor code when I had the 87 Octane Program in the truck.

Anyone know wnat else can cause this to happen. I am thinking it might be that the airrade is getting dirty and needs cleaning, but I am grasping at straws...

Cheers,


Doug