[Rivergoer]

2018 diesel MT sedan

Leaving the post office parking lot I got the message displayed saying "Engine Power Reduced" and the CEL is on. Engine wouldn't really run above about 2,200 RPM so it was slow getting to work. Restarting the car has a new message saying the particulate filter is full and continuous driving is necessary.

Any suggestions? After work I'm going to take it out and do some highway driving to see if the particulate filter will regen and clear up the issue. The next appointment at the dealership is on Monday so if it isn't self-correcting I'll have it there then.

Yep, DPF needs a regen.

Hopefully a 20-30 minute drive on the highway will resolve it (Active Regen).

If not, a trip to the dealer is in order (Forced Regen).

 

[Rivergoer]

Perhaps this thread could be moved over to the Gen 2 Diesel sub-forum to generate additional input.

 

[Rivergoer]

Those things don't come with regen switches? Like semi's

Nope, but it’s on my Christmas wish list.

That’s why I chose to get a Scan Gauge II. It’s a great way to know when to keep driving while the regen is active.

The car is programmed to restart interrupted regens multiple times, but after several (some have said approx five) failed attempts, it’s limp-mode city.

 

[Rivergoer]

Just to add I read in related threads this might not be a plugged DPF but possibly a faulty or intermittent pressure sensor.

Dealer will be able to figure out for sure.

Good luck and keep us posted next week.

 

[Rivergoer]

Regens are quirky beasts with this car.

Using the Scan Gauge I’ve seen soot mass reach 20 grams (normal regen threshold) and then intentionally driven for another 50 miles on the highway and never triggered regen.

On the other hand, I’ve seen soot mass at 18 grams suddenly jump up through 19, 20 and trigger regen within 10 miles of city driving.

All this to say there are so many factors that go into the regen computations, not just soot mass or engine operating temp.

Granted mine’s a Gen 1 but from what I’ve seen here the treatment system appears to function very much the same in the Gen 2.

Glad to hear you don’t have a failed sensor or other component. Hopefully all’s well going forward.