High IAT temps on 2011 after Regen

[Rljones1961]

My 2011 3500 is close to the magical 67,500 mile EGR cleaning. I purchased a CTS Edge insight to monitor engine performance since I tow a 40' 5th wheel.



After regen the IAT temp climbs to over 210 degrees on the CTS. The truck has been getting higher temps after regen as the miles add up. In normal mode (non-regen) the temp sits at 110-120 degrees. Last night on the way home it climbed to 195 degrees suddenly and engine seemed to lose power, then quickly dropped back to normal range. It never went into regen.



I bring this up because I have had 4 Map Sensor failures in 14 months. It will throw a code P0106. Last time it added code P0049 for turbo overspeed. Both sensors were replaced and it has since thrown another P0106 and another Map sensor replacement. I have 5K since last work was done on truck and no issues. Truck is 100% stock.



I ask this because no Dodge dealer in ATL area has been able to explain the high IAT temps (is that normal or not) after regen and why has this truck needed 4 Map sensors replaced. Last dealer wanted to blame the CTS unit, but it only monitors the engine.



Truck is almost to end of warranty and these repeated failures are starting to worry me. Truck is driven 80 miles daily with 95% on interstate at 70+ speeds.



Does anyone have the Edge Insight to report IAT temps after regen and advise if that is normal on the 6. 7? Are the IAT temps even an issue with the Map sensor failures? This forum has a lot of knowledgable folks and I'm reaching out for it now. I also wondering if the 67,500 mile service for the EGR system is causing some of these issues?

 

[Beast2B]

The MAP is only a pressure sensor, right? If the MAP sensor and IAT sensor both come through the same part of the wiring harness to the intake area I'd start looking for a problem in the wiring. Bad IAT voltage and an issue with the MAP seems a little coincidental...

 

[AH64ID]

The MAP sensor reports manifold pressure and temperature.

I would guess that the temp increase is from the EGR, and if those temps are abnormally high then the EGR valve may be sticking or slow.

Have you seen if the intake is plugged from soot, as that too could effect the operation as a dirty MAP sensor, or around the MAP sensor will be slower to see a temp increase from the EGR and the ECM could be commanding too much EGR and by the time the temp registers the intake is full of hot exhaust.