The best would be to carry out a CAN-scan and post any fault codes set in the engine management system (ECM) on our site for evaluation.
On your vehicle "Risk of filter clogging" refers to a possible issue with the Diesel Particulate Filter (DPF).
The cooling fan activation usually points towards a possible regeneration the ECM is trying to carry out to unblock the DPF.
A service regeneration is usually carried out by the vehicle when it has reached operating temperature and is driven at speeds in excess of 60 MPH for at least 20 minutes. The fuel tank must be at least 1/4 full or more
A few videos:
A good article:
Friday, May 26th, 2023 AT 9:02 AM