- Highest Ratings
- We've won the Bizrate Circle of Excellence award,
Quality: We've got the awards to prove it!
7 years in a row. Rated outstanding for quality, satisfaction, service, and on time delivery. 1A Auto selects the highest quality parts from the best manufacturers. Check our excellent ratings.
- Fastest Shipping
- No-Hassle Returns
- USA Support Techs
- Best Value
- Our Guarantee
John, Murietta, CA
Oil Pressure Switch
The oil pressure switch, also referred to as an oil pressure sensor or an oil pressure sending or sender unit, monitors how many PSI your oil system is running and sends out a signal. A single vehicle can have more than one oil pressure sending unit.
In older vehicles, the oil pressure switch sends a signal to a gauge or light. If your car is equipped with an oil gauge you can see the status of the oil pressure. If you have a warning light it should light up when you start the car, shut off when oil pressure builds (as engine and oil pump turn), then only light again if a low oil pressure condition is detected.
On newer cars, the oil pressure sending units can send a signal to a gauge or light and/or also send a signal to the vehcile's computer. The signal to the computer would most likely lead to the computer shutting down the engine if low oil pressure is detected.
On new vehicles, an oil pressure switch is best diagnosed through the vehicle's on board diagnosis system. If you have an older vehicle and you are trying to diagnose a simple 1 wire sending unit to a gauge, you can ground the lead that goes to the oil pressure switch (unplug it and touch it to metal with the key on). This should cause your gauge to read at it's highest level. If the gauge does this, but when re-connected, with the engine running, reads zero then you either have a bad sending unit or no oil pressure.
At 1A Auto, we make shopping for a replacement oil pressure sensor for your car, truck, SUV or van easy - we're here to help you select the right part for your vehicle! Call our customer service toll free at 888-844-3393 if you have any questions about our aftermarket oil pressures switches, warranty, compatibility or to purchase, or you can buy online.
Welcome to 1A Auto....
We employ USA based, knowledgeable support technicians. They'll help you through your project. We always make sure you get the right part. And we boast the industry's most generous returns policy. You won't find a company more passionate about auto parts than 1A Auto.