P0236 after oil change

[DGibbs]

Just changed the oil on my 2003. Pulled the pipe and elbows between the air cleaner and the turbo for better access to the oil filter. When done, I go to start the truck and the MIL light stays on. I realize I forgot to reconnect the wire harness on the air cleaner elbow so I reconnect it. Start the truck agina and MIL light is still on. Cycled key 3 times and got P0236.



FYI - Read a lot about the Quad box creating this code due to bad connections. I put on the Quad about a week ago and used dielectric grease on all connections. Been running it on the 100 HP setting all week with no issues. I can't help but think this code was caused by forgetting to reconnect the air breather wiring harness. Thoughts? If that is it, how long before the MIL goes off?

 

[Mobius1]

how long before the MIL goes off?

The MIL will go off after about 50 good trips I think. Or 50 times that it meets a certain parameter and passes

 

[nickleinonen]

another good reason to access the lube oil filter from below since it is so easy to get at from down there...

 

[Slow Six]

I have the Quad box and I have the P0236 code also. I had it reset with a scan tool and the code reappeared again. Some others on here have also gotten this code with the Quad box. As for the filter I have always got to it from the bottom. You are already down there to pull the plug anyways.

 

[LStanphill]

Disconnect the batteries, turn key on while disconnected to discharge any stored energy in the system. reconnect batteries and it should be gone. . worked for me anyway.

 

[DGibbs]

Thanks LStanphill. Took about 4 starts before the light went off. All is well.