Sam and Leo brought up an interesting subject to me on Tech Guy 1684 6 April.
In February, my VW Tiguan came up with a message when ignition turned on that said “Oil Level Sensor Warning - Workshop”. Great, so I checked the oil immediately. No problem. I usually check it before longer trips as taught back in 60’s when I learned to drive. Actually, back then, the driveway attendant asked and lifted the hood and checked oil every time you filled up fuel.
After calling shop, and avoiding the argument I knew what was wrong, they would not schedule replacing the oil level sensor until they had car for full day to run diagnostics. $200.00. Then, they scheduled repair 2 weeks later. That only required morning in shop, and cost additional $850.00. Amazing plugging in a computer takes longer then working on the engine.
I figure they added all these sensors because most people just don’t want to think about car maintenance.