V70 Diesel DPF Issues

Sounds like a real pain! I had something similar happen in my old car, though it wasn't a Volvo. That smoke and loss of power is nasty. Have you tried just giving it a good blast on the highway to see if it clears itself? Sometimes that helps burn off the gunk in the DPF. Just a thought!

Thanks for the suggestion. I am hesitant to do that without further diagnostics. Could elevated exhaust temperatures make the problem worse if it's a defective sensor? I am also concerned about causing damage to other exhaust components.

Yeah, you're right to be careful. Sensors can be tricky things, and if it's faulty, you could end up doing more harm than good. Honestly, with those symptoms and your worries, I'd say it's probably best to get it checked out by a workshop. They'll be able to pinpoint exactly what's going on.

I took it to a mechanic. It was indeed a defective exhaust back pressure sensor as suspected. It was replaced at a cost of 245€. The symptoms are now resolved. Thanks for the help.