I got this code with check eng light, could not clear it by disconnecting the batts for about 42 min to be exact. I gave up then after about 5 starts to go to work and such it went away on its own. I know what its for and the grid heaters seemed to work from watching the amp gauge drawl down as usual. I don't know why it appeared and don't know why it disappeared. Any one else have it act like this?

 

Guess not?

 

I got the same code also, (P2609-Intake Air Heater Relay,) its been on for a few days now, I clear it and it comes back, so back to the dealer I go............again!!