Identify defects in the oil pressure switch / oil pressure sensor!

Is the oil pressure switch / oil pressure sensor defective? We know the typical symptoms, we know the repair / replacement process and we also have some information about the costs involved. Yes, first a few general details. In order for an internal combustion engine to run properly, it is necessary for the internal components to run with be lubricated with oil. The oil required for this is fed into the engine system with the help of an oil pump at a specified pressure. When the engine ignition is actuated, the oil pressure warning light (red oil can) shortly up, she erlischtas soon as the engine is started. If the symbol lights up permanently even after the engine has been started, it is urgently necessary to visit a workshop. At best, the motor is even direct to turn off and tow the vehicle away.

Symptoms: defective oil pressure switch

Some signs may indicate a defect in the oil pressure switch. These include: Permanent or occasional lighting up of the oil pressure warning light when the engine is running, a message such as "Oil pressure too low" or "Oil pressure too high", an oily connector from the oil pressure switch or a fault memory entry with a message such as "Oil pressure implausible". Affected vehicles are often the Opel Corsa C and the Opel Corsa D as well as the Audi A6 4F as a 3.0 TDI. But it is also possible that the oil pressure switch no defect having. Then there may actually be a problem with the lubrication of the engine. The causes for this are very often old or too little engine oil, a clogged oil screen or an oil pump that is too weak or defective. Only one can provide a reliable diagnosis oil pressure measurement in a factory. Here the existing oil pressure and the function of the switch are checked at different speeds.

What to do in the event of a defect? Continue or change?

If any of the above symptoms appear, it is advisable to visit a workshop and have the defective switch diagnosed. Otherwise you run the risk of not being warned in time, for example in the event of an actual loss of oil. The consequence could be a capital one engine failure being. In older vehicles was usually only a Installed oil pressure switch. In modern vehicles, on the other hand, they are often found several oil pressure switches or oil pressure sensors at various points such as directly on the oil pump, on the cylinder head or in the high or low pressure area. In order to be able to make a clear diagnosis here, it is necessary to have an oil pressure measurement carried out. Only with this professional diagnosis can it be ruled out that there is a fault in the lubrication of the engine. After the reliable diagnosis, the defective oil pressure switch (or a defective cable) can be replaced with a new part. Due to the low material costs, a repair or exchange for a used part does not make sense.

cost of change

Depending on the manufacturer, the pure material costs for a new component amount to approx. 10 to 50 euros. The well-known manufacturers of oil pressure switches in this country are febi bilstein, Bosch or Meyle. Depending on the design of the vehicle and the accessibility of the oil pressure switch, the time required, and thus the costs, for removal and installation varies. Usually it takes between half an hour and two hours for the change. If you take labor costs of 100 euros per hour as a benchmark, then this results in costs of 50 to 200 euros. If you add the material costs, the total costs are between 60 and 250 euros.

The following note is essential: For safety reasons, tuningblog recommends all repair, inspection and maintenance work exclusively to be carried out in a specialist workshop! Although our information is summarized to the best of our knowledge and belief, we cannot assume any liability for the content. All information is therefore "without guarantee".

Of course, that wasn't the end of it!

In this tuningblog category there are guides and instructions for common defects/repairs on the vehicle and for installing accessories/tuning parts. Our articles explain in a simple way common defects and the corresponding repairs, as well as explaining how the first signs of a defect become noticeable. In most cases, we also have initial clues to the repair instructions in our repair instructions approximate The costs of the pending repair are listed. The goal of our subcategory “Auto Repair Guide“ is to create a head start in knowledge for the next visit to the workshop with initial tips. This may save you from tedious troubleshooting and small things can perhaps be done directly on your own. The same applies, of course, to the installation of accessories/tuning parts. Here, too, we would like to help with the implementation with instructions and tips. There are many other posts on this as well. Below is an excerpt of the last and HERE there are all previous instructions:

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