Excessive regenerations

[Mudflap77]

(01-24-2022 )Colter Wrote:  Please don't just blindly swap sensors, its too expensive to just guess.

The probability that your actual cooler is leaking is much higher then a boot, you can make a rough
tester from PVC although an actual test tool kit will be the same price as one or two sensors.

You can use Insite to check fuel rail leakage, this may fail even without a 0559 code active/inactive but the code will have your fuel system troubleshooting. Even if your out of spec I would still put more weight on air or lack thereof being a more prevalent issue.

I agree with you to a point, I'm not one to blindly throw parts around without a thought process behind it. Sensors can fail in range and not throw a code. When I had the sensor fail last summer the truck was sounding a bit odd that morning making noises I now relate to the EGR. still ran fine, then the sensor completely failed at 3:30 pm saturday afternoon on the july 4th weekend in Aberdeen SD 2.5 days down and a late delivery for a $160 sensor. Now when talking about the Nox sensor @ $880 if it wasn't showing not stable reading and no codes but also there is the fact it is original as far as I know and has been sniffing exhaust for about 18,000hrs. Also being on a 2 week turn around schedule with only 2 or 3 days home to figure some of these problems out at some point you just say F-it change them all. LOL

The boots @ $35/pcs are a wear item in my mind they will leave you dead on the road climbing a 11% grade when they blow. As mentioned earlier I replaced a leaking clamp already. I have a CAC test kit and tested the CAC back in Sept. I usually test it about every six months.
I dont thinks its fuel related either but a want to cover all angles. Sooner do extra work at home then have problems out on the road..