Fault Code P2609 & P2509
I've got a 2007 2500 with a 5.9 CTD. A little of a month ago after the grid heater cycled while starting on a cold night, the CEL came on. Code P2609 (intake heater grid abnormal voltage drop). It started and ran fine afterward so I didn't think too much about it and after a couplefailed attempts to reset the code by leavingthe battery cables off for about 30+ min, I decided to live with it until it was convenient to take it in.
About 2 weeks ago while starting it in about 20 degree weather, the light shut itself off and stayed off until this morning when starting it in about 50 degrees temps --for some reason the intake heater light came on even though it was really warm--the CEL came back on and is now showing code P2609 again along with P2509 (ECM/PCM Power Input Signal Intermittent).
Anyone have anyexperience with this? I looked up theP2509on this forum but it looks like a while ago when someone had an issuethe dealearship was stumped. Should I be worried? Am I ok to drive and start in cold weather?