Hi! I also have a problem with a 2006 mazda 6. I replaced the particulate filter and temperature sensors, and after about 60 km, the DPF warning light appeared, which was flashing. I made a diagnosis and checked. We found error P2428, too high temperature in bank 1. In terms of parameters, temperature sensor 2 on bench 1 had a higher temperature than sensor 1. Why, could it be? Thanks!