Hi I'm new to this so bare with me. I own a diesel 2.2 mazda wagon/estate. The car was running fine but had the DPF light showing. This light had been showing for 3 months now. After doing what the hand guide said twice I went to four different mechanics who said there is no problem with tbe DPF it may be a sensor fault. I decided to do my own research and found a video that said that when a service is done by non mazda specialists the people doing the service may not be able to reset the DPF It the showed a way to reset the light using a wire from the engine bay fuse box to any grounding point in the engine bay and pressing the accelrator 10 times. After I did this the light went. 5 minutes later when I returned to the car ever light on the dash board had lit up. The speedneedle on the speedometer had dropped and wouldnt go up despite the Rpms being fine. The power steering also stopped working the wheel will turn but it is very heavy. Can anyone help me?