6.7L Cummins Forum

Hi Gang,
Bought a used 2008 2500. Had it in the shop once with high EGT. Now I am on the second engine code P254B (high temp EGT) Bank 2.
What causes high EGT? Can excessive idling do this?

Thanks...

How many miles do you have on it? From what I've read, high egt's can be caused by a number of things from a bad injector to a blown turbo. Is it still under warranty? i don't think idling will cause it.

How high is high? I have seen 1600* on mine.

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07.5 3500 Quad, SRW, 4X4, Laramie, Leathered, Dark Metallic Gray, 6.7, 68RFE, 20K Reese, Ride Rite's, 2 Viair air compressors, Bully steps, Kleinn Locomotive air horns (5 in all), Billet polished locking fuel door, 'A' pillar mount Auto Meter Pryo, PML X-deep trans pan
06 Durango 285 RL 5'er Lifted by KZ

Excessive idling will not do it. Excessive idling will cause the DPF to load up faster and cause a different error. If diesel is getting into the exhaust it will cause the DPF to react, in turn raising the temp. Leaking injector would do it on a common rail.

My suggest would be to get a Infrared hand held temp unit from Harbor Freight (about 30.00) and do some testing at the same point as the sensor. Could be something as simple as a bad sensor (if really lucky). If DPF is cool and the pipes at the sensor are cool, then possible sensor issue ....

Can you post more info about when you see this happening ? Driving conditions, towing, etc. Details would help us all.

Hope this helps a little

Cheers.

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Thank Guys,
Appreciate the feedback. I have confirmed that you are both right. Idling is not the issue. I had the truck in to the Dodge dealer previously and the sensor was replaced. Codes P2080 (EGT Sensor Performance - Bank 1) and P242B (EGT Too High Bank -2) are set. (Innova OBD II code reader - bought a new one). Mileage 47000 km (less than 30000 miles). EGT temp is 1574 deg F. As this is the second time in less than a month with the same issue, I want to get some insight into what is causing this. If 79ta is right, and there is a turbo gone I want to get it fixed while the last of the warranty is still in place. I am on the fence as to whether I want to pay to extend the warranty at this juncture.
I was driving on highway at 100 km/h (60 mph) when the light came on. There was no load and driving condition were fair on bare pavement.
I will try to upload the data from the reader and post it.
If nothing else, I will at least document and share my findings in the hope that someone else can benefit from my experience.
Happy New Year

So, yet another sensor replaced. So far this fix seems to be working after the first 100 miles...

Great news. The electronics on newer vehicles are funny and sometimes the fix is a simple sensor. Keep us posted.

So to end this story. I have put another 8000 miles on the truck since this probelm started. Since then I have completed the EGR Service/Clean and I drive it 'like it should be' (quoting Squid). Haven't had any issues since. Now that I have a Juice installed I can see the EGT. It runs within the norms and goes high when REGEN starts.
Love this truck

Great ! Thanks for posting an update.

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