P2607?

[mberry]

Ok, I got this code this morning. Not on the first start either which is wierd to me. Anyway, I need you great peoples' help in telling me how to fix it. Thanks.



P2607 Intake Air Heater Relay 2 Low

 

[Alan Reagan]

You may try swapping the #2 relay with the #1 relay and see if the problem moves. Sounds like the relay might be bad and you aren't getting voltage to the grid through the #2.

 

[mberry]

Thanks Alan. I'll try that.

 

[Alan Reagan]

Each of the relays controls a grid. What it looks like is that the control signal leaves the ECM, activates the relay and the return line from the relay coil goes back to the ECM. If the coil is not functioning properly, then you would get a low voltage on the return line. At least that's what it appears to do. You could measure the voltage on the grids. If you have voltage on one and not the other, then one of them is not working..... probably #2. Swap the relays and the voltage should move to the other grid. Could be as simple as the relay not being plugged in good. Problem is going to be turning the key on and measuring before the grids cycle. On a cold morning, it won't be a problem..... they will just keep cycling.

 

[mberry]

Great info Alan. I appreciate it. The CEL went out while I was running errands at lunch. I'm going to check the relays when I get home tonight. Thanks again!



Mark.

 

[thejeepdude]

My truck generated this code months ago after I installed my AFE/TT. I couldn't see how they could be related, but the code would come and go every few starts for a few weeks, then it never happened again. If you take it to the dealer, let me know what they say...