Originally Posted by briers
You will need to clear the codes before a regen can happen. I think some garages can force it for some cash.
Question is why hasn't it regen, unless its high mileage or low mileage short journeys car. What temps does it achieve?
I replaced both my stats as mine would struggle to achieve 76c in the cold with heaters on. The stats had failed and the new ones sit at 92c every journey within about 10mins.
If yours doesn't achieve at least 78c it will never regen and get clogged.
I'm going to get my thermostats checked and take it from there, also get the faults cleared. mileage is 88000 on a 2006 car, daily 30 mile round trips on clear A roads, no sitting in traffic, also at least monthly 400 mile round trips on the motorway.