The orange light flashes intermittently. The oil level is correct when dipped. A garage tells me to replace the sensor at around 135.00 plus a couple of hours labour! (without testing the unit) or, ignore it and check the oil level regularly. My point is whether there is a loose connection activating the warning light. So, which fuse is involved as I cannot find it on the diagram ?
WHY? Because fuses 1, 27, and 37 fused with the car stationary, and thereby a n unsolved mystery. I just wonder if this sensor connection is at fault.

Just a few days ago the car went into "safe mode" meaning lost the biggest part of its horsepower and at the same time the preheaters warning lamp was blinking. After a visit to a mechanic he told me that the obd indindicated several malfunctions such as, faulty preheater No 3, EGR valve problem and low turbo pressure. After thinking a lot and after seeing that the EGR valve was in good condition we just replaced the above mentioned preheater. The cost was not low (290 € just for the preheater) but as they mentioned it is a complicated part that includes a pressure sensor that can cause not only malfunctions but can mislead the mechanic to search the problem elsewhere.