I had an interesting one with the 1921 code recently, I don't know if this feature is only available on commercial/heavy duty trucks but after going through all the troubleshooting steps on quickserve. I noticed that in the data monitor it stated that the brake pedal was depressed versus released causing the Regen not to initiate. I found a chaffing wire to ground at U24 going to the ECM. Which was causing the depressed brake pedal.
The starter kit only has HD Standard coverage. That doesn't include any bi-directional controls until you add some software packages. Shown in this video is the Cummins software, so to do this test you'd have to have a starter kit with Cummins software added.
What's the soot load indicated on the scanner? What's the DPF backpressure at full throttle in Neutral? Have you tried commanding a regen with your scanner?
@@joediagnostics I’m just a driver I called loves mobile mechanic and that’s the code came up always 4612 engine intake manifold pressure system both are active. It’s saying something about dpf regen needed on the diagnostic test
What was the cause of dog soot loading?? I have a Cummins isx 12 loading very rapidly around 45 mph. Kinda need help. Dunno how to test the injectors leaking or what my temps should be
