Mercedes Oil Pressure Switch Failure and How to Fix It
21 Dec, 25
Nowadays, all luxury cars, including your Mercedes, come equipped with many advanced features that help ensure smooth operation and better performance. However, issues with the oil pressure switch can adversely affect your Mercedes’ performance.
In fact, you are going to come across an illuminated oil pressure warning light on the dashboard of your Mercedes, and this is when you must immediately take note of it. In this article, we will discuss the ways to troubleshoot Mercedes oil pressure switch failure.
Ways to Troubleshoot Oil Pressure Switch Failure
We at Santa Barbara Autowerks, located near you in Santa Barbara, CA, have years of experience fixing high-end cars like Mercedes, and we are going to share with you ways to troubleshoot the oil pressure switch problem.
Inspect the Oil Pressure Warning Light
There are numerous warning lights on your Mercedes’ dashboard, each linked to a specific component. The oil pressure warning light illuminates when the oil pressure switch is malfunctioning or when there are serious underlying issues with the oil pressure system.
Most of the time, a malfunctioning oil pressure switch causes the warning light to flicker or remain illuminated. Additionally, suppose you notice other warning lights, such as the check engine or temperature warning lights flashing. In that case, you must stop driving immediately and pull over to the side of the road.
Don’t panic, and let the situation normalize. Then you should drive to the nearest auto repair center located in Santa Barbara, CA, to get your Mercedes inspected by certified mechanics.
Check the Oil Level and Quality
The engine oil level in your Mercedes should be checked whenever you notice issues with the oil pressure switch. Park your high-end car on a flat surface, let the engine cool, then use the dipstick to check the oil level and condition.
In fact, you might wonder why this inspection is being recommended in the first place. This is because, most of the time, inadequate engine oil levels can lead to low oil pressure, which can cause the oil pressure switch to fail in your Mercedes.
In addition to low oil levels, the presence of wrong or contaminated engine oil can also cause oil pressure switch issues. That is why it is important to check the oil level and condition before concluding that the oil pressure switch in your high-end car is malfunctioning.
Examine the Electrical Connections
Numerous electrical connections run to and from the oil pressure switch, and it is necessary to inspect them. While inspecting the electrical connections, it is essential to look for corrosion, bent pins, or loose or dirty connections.
In addition, you can test the oil pressure switch with a multimeter. Because the oil pressure switch in most Mercedes models stays closed when the engine isn’t running, you must get a continuous reading, as the circuit remains complete.
Now, upon starting the engine, the oil pressure builds, and you should lose the continuous reading. Moreover, if you notice flickering readings on your multimeter, your oil pressure switch is failing internally.
Scan for Diagnostic Trouble Codes
One of the most effective ways to deal with an oil pressure switch failure is to use an OBD-II scanner to read the trouble codes, which are generated whenever something is wrong with your car. Now, if you are getting codes like P0521 or P0522, then there is something wrong with the oil pressure switch of your car.
However, if you are having difficulty conducting the diagnostic test on your own, reach out to Santa Barbara Autowerks in Santa Barbara, CA, to have your Mercedes inspected by our professional mechanics.
Top Service and Repair Facility in Santa Barbara For Mercedes Oil Pressure Switches
Santa Barbara Autowerks is 
the go-to Mercedes repair facility in the city of Santa Barbara, California. In fact, our auto repair shop is equipped with the latest tools and diagnostic equipment to diagnose and repair oil pressure switch failures in your Mercedes.
Our team of certified mechanics is passionate about high-end European cars like Mercedes and will ensure your vehicle is free of all problems when it rolls out of our garage.