Matrix diesel particulate filter issue

Sounds familiar... I had something similar happen with my Matrix. DPF issues are a pain. Low exhaust pressure, huh? It's like trying to blow up a balloon with a hole in it! Before we jump to sensors, have you checked for any obvious exhaust leaks? Even a small one can throw off the pressure readings. Also, any idea if the DPF is actually clogged? Have you tried forcing a regeneration cycle?

Thanks for the quick reply! I haven't checked for leaks specifically, but I'll have a look tomorrow. How would I check for leaks – just visually inspect the exhaust system? As for the regeneration cycle, I tried initiating it with my scanner, but it wouldn't start, saying something about 'conditions not met'. Could that be another sign of a faulty sensor?

Yeah, check for any obvious soot or black residue around the exhaust joints; that's usually a good indicator of a leak. If you can't force a regeneration, and you're getting low pressure readings, a faulty sensor becomes more likely. It sounds like that sensor is as useful as a chocolate teapot! Honestly, given your symptoms and the error code, I'd suggest biting the bullet and taking it to a decent workshop. They'll be able to diagnose it properly and replace the sensor if needed.

You were spot on! Took it to a local garage, and they confirmed it was the exhaust back pressure sensor. Replaced it for 245€, and the car is running perfectly again. No more warning light, full power restored, and the smoke is gone. Thanks for pointing me in the right direction!