848phantom
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848phantom's post in Regen issues was marked as the answerFinally found the two issues that were causing my problems 🤦🏻
Bit the bullet and bought a smoke tester on eBay.
Two vac leaks, one was the brake booster (the check valve was also passing) and the other was the egr cooler solenoid. So I assume with the leak the egr solenoid wasn't opening the bypass door to allow the car to regen, so the car was constantly stuck trying to regen.
Hopefully this helps anyone else with this issue.