My amber check engine light and engine start/stop disabled light have been on since the start of a 2,500 mile trip around Scotland. I'm home now and it remains on and I need to get the van it's first MOT so I plan on replacing the DPF sensor to see if that fixes the issue. I've had a good look under the van but cannot see it. Can anyone help me find it. I did spot a sensor on the bulkhead, but I don't think it's the DPF, but I've added some photo's of it just to confirm.