Cummins isx manifold pressure sensor

Where is the intake mainfold pressure sensor located on 2006 isx cm870? I need to get it out and check to see if it's clogged. I'm getting engine light and it says code 419. Happened few miles after I got overhead and oil change done. I'm not sure what parts they took off to do the overhead.

 

Well now I am thinking it's related to the ScanGauge D that I just bought. It all started when I plugged that thing in. At first it was code 419, so I thought that the shop must have bumped the connector or unplugged it while doing overhead. So I pushed all connectors together. Turned engine on, no CEL, shut off. After i got my paperwork, I left, and CEL came up and it was 111 this time. 111 Electronic Control Module Critical Internal Failure - Bad Intelligent Device or Component

So now the CEL won't go away after few restarts with ScanGauge unplugged, so I'm home for thanksgiving. Going to fire her up again tomorrow morning and see if the CEL appears again. If its gone, I'll plug the ScanGauge back in and see if it trips the CEL again. If it does, I'm sending it back to Amazon.

 

I had that checked 3 weeks ago, the batteries load test, and alternator as well too. I'm having poor power storage lately. If i have the fridge on, the battery will fall so low, after 4 to 5 hours The engine will barely start. But the test turned out well. I have cleaned the battery connections. I have not cleaned the grounds and connection to the starter yet. Will have to do that tomorrow morning.

 

Didn't get any chance to do anything with the truck today. However I did stop by and check to see if the engine light came on, it still came on. I'm sure its still the same code 111. I will be working on it tomorrow morning, taking off grounds and clean it up re connect it. check other connections. Hopefully it will go away. If it does, will it be harmful to drive with that type of CEL on? I drove 160 miles home with that code and there was no issues at all, it performed the same as usual.