Where is the oil pressure sensor located?

In most cars, the oil pressure sensor (also called a sending unit or oil pressure sender) is threaded into the engine block or oil filter housing and wired to the dash gauge or the engine computer. Exact spots vary by make and model, so check the owner's or service manual for your vehicle.

What the oil pressure sensor does

The sensor or sender monitors oil pressure produced by the lubrication system and relays that information to the dashboard gauge or the engine control unit. In older cars you might encounter a simple oil pressure switch that completes or breaks a circuit to warn you when pressure is too low. Modern vehicles typically use an electronic pressure sensor that feeds the instrument cluster and, in some cases, the ECU for diagnostic checks.

Common locations on many vehicles

Automakers commonly place the oil pressure sender in accessible spots on the engine block or nearby components. The following are typical places to look:

• Near the oil filter housing on the side of the engine block


• On the engine block itself, close to the crankshaft oil gallery


• On the cylinder head or under the valve cover area on some engines


• On the timing cover or near the oil pump outlet in select designs


• In some diesel engines, toward the rear of the engine block

Because layouts vary widely, this list serves as a starting point. Your exact location will be shown in the service manual or a parts diagram for your vehicle.

How to locate it on your model

To pinpoint the exact location for your car, follow these steps. The steps below outline a practical approach that works for most gasoline and diesel engines:

1. Consult the owner's manual or a factory service manual for the exact sensor location diagram, using terms like "oil pressure sender" or "oil pressure switch."


2. Search online for model-specific diagrams or use a parts catalog by entering your vehicle’s year, make, model, and engine size.


3. Open the hood and trace the wiring from the dash gauge or warning light to the engine area; visually identify the small threaded sensor with an electrical connector.


4. Inspect nearby components such as the oil filter housing or the oil gallery plugs to locate the sensor’s mounting point.


5. When in doubt, have a professional confirm the location, especially on newer or complex engines.

Finding the exact spot can save time and reduce risk when inspecting or replacing the sender.

Testing and replacement considerations

If you suspect a faulty sensor, start with basic checks and then proceed to testing or replacement as needed. Common steps include:

• Check the engine oil level and condition; low or dirty oil can affect readings.


• Inspect the sensor and wiring for damage, corrosion, or loose connectors.


• Use a scan tool or multimeter to read the oil pressure signal and compare it with mechanical gauge readings if possible.


• Replace the sensor with the correct part for your engine, using the manufacturer’s torque specification and sealant or O-ring as required; avoid over-tightening.

In some cases, fluctuating readings or warning lights indicate other lubrication-system issues (oil pump, pressure relief valve, clogged passages) that require professional diagnosis.

Summary

The oil pressure sensor is typically located on the engine block or oil filter housing, but the exact spot depends on your vehicle. Start with the service manual or a reputable diagram to locate it, then follow safe testing and replacement procedures if you suspect a fault. A properly functioning sensor helps protect the engine by signaling low oil pressure before damage occurs.

Can you drive with a faulty oil pressure sensor?

No, you should not drive with a faulty oil pressure sensor, especially if the oil warning light is on, as it puts your engine at risk of severe and costly damage. While you can technically drive if the sensor is giving a false reading and the engine is running fine, it's a huge risk because the sensor may not warn you if the actual oil pressure drops dangerously low, potentially leading to engine seizure. 
This video explains the risks of driving with a faulty oil pressure sensor: 1mTalkingTechTrendsYouTube · Jun 25, 2025
Why it's dangerous

• No warning of real issues: If the sensor is faulty, it can provide false readings or not work at all. This means you won't get a warning if the oil pressure genuinely drops due to a leak or pump failure. 
• Engine damage: Without sufficient oil pressure, moving parts in the engine will not be properly lubricated. This can cause them to grind against each other, leading to serious and potentially irreparable damage, including a seized engine. 
• False alarms can be misleading: If the sensor is giving a false alarm when the oil pressure is actually fine, it's still a serious safety risk. You might ignore the warning, but if the real problem occurs, you'll be in a dangerous situation with no warning at all. 

What to do instead

• Do not drive: Avoid driving the vehicle. Pull over to a safe location and turn the engine off immediately. 
• Check your oil level: Use the dipstick to check the oil level. If it's low, add the correct type of oil. 
• Seek immediate professional help: Have the vehicle towed to a mechanic to diagnose and fix the sensor or any other underlying issues. 
• If the oil level is fine: Even if your oil level is good, a faulty sensor should be replaced to ensure you are warned of any future problems. 

You can watch this video to learn the symptoms of a bad oil pressure sensor: 56sAuto Fix DiaryYouTube · Jul 20, 2025

How much does it cost to replace the oil pressure sensor?

The average cost to replace an oil pressure sensor is $175 to $219, but it can vary based on your vehicle and the complexity of the repair. The parts typically range from $20 to $80, while labor costs can be anywhere from $50 to $150 or more per hour, depending on how difficult the sensor is to access. 
Cost breakdown

• Parts: The oil pressure sensor itself is relatively inexpensive, usually costing between $20 and $80, though some can be more for luxury or performance vehicles. 
• Labor: This is the largest factor in the total cost, as some sensors are easy to reach while others require significant time to access, such as removing the intake manifold. 
  • Hourly labor rates typically range from $85 to $150. 
  • Total labor time can vary from under an hour to several hours, depending on the vehicle. 
• Total cost:
  • A general estimate for a typical vehicle is $175 to $219. 
  • Mobile mechanics may offer lower prices, with estimates ranging from $203 to $371. 
  • Complex or luxury vehicles could cost significantly more. 

Important considerations

• Do not delay: Driving with a bad oil pressure sensor can lead to serious and expensive engine damage or a completely seized engine, so it is crucial to get it fixed promptly. 
• Get a precise quote: The final cost will depend on the specific make and model of your car and the labor required to access the sensor, so always get an estimate from a trusted mechanic or repair shop. 

How do I check if my oil pressure sensor is bad?

You can check a bad oil pressure sensor by first noting symptoms like a warning light, gauge fluctuations, or engine noises, then performing a visual inspection, and finally testing the sensor with a multimeter or by manually replacing it with a pressure gauge. These methods help confirm if the sensor is faulty or if the actual oil pressure is too low. 
Symptoms of a bad sensor

• Illuminated warning light: A persistent or blinking oil pressure warning light on the dashboard is a primary indicator. 
• Erratic gauge readings: If the oil pressure gauge shows inconsistent readings, sticks at zero or maximum, or is constantly fluctuating while driving, the sensor may be bad. 
• Engine performance issues: A failing sensor can sometimes cause poor engine performance, like rough running or stalling, if it incorrectly reports low pressure. 
• Engine noise: An engine might make unusual noises, like ticking or knocking, because the sensor isn't providing the correct information for lubrication. 
• Check engine light: The "check engine" light can also illuminate, especially if there are related trouble codes. 

How to test the sensor
This video demonstrates how to test an oil pressure sensor with a multimeter: 1mAuto Fix DiaryYouTube · Jul 20, 2025

1. Visual inspection: Look for obvious signs of damage, such as cracks, or check for oil leaks coming directly from the sensor itself. Also, inspect the electrical connector for loose or corroded wires. 
2. Check for trouble codes: Use an OBD-II scanner to read any diagnostic trouble codes related to the oil pressure sensor. 
3. Multimeter test:
   • Set a multimeter to read resistance (ohms) or voltage. 
   • Connect the leads to the sensor's terminal and body (for a one-pin sensor) or to the two different pins (for a two-pin sensor). 
   • Compare the readings to the vehicle's specifications. A sensor that is "open loop" (no reading or infinite resistance) when it should be sending a signal is likely bad. 
4. Manual pressure test:
   • Remove the oil pressure sensor and install a mechanical oil pressure gauge in its place. 
   • Start the engine and compare the gauge's reading to the manufacturer's specifications. If the manual gauge shows correct pressure but the dashboard gauge does not, the sensor is likely faulty. 

You can also watch this video to see a detailed walkthrough of the entire testing process: 50sGerard BurkeYouTube · Mar 22, 2021

Can I replace an oil pressure sensor myself?

Yes, you can replace an oil pressure sensor yourself, but it requires some basic mechanical knowledge, tools, and safety precautions like using jack stands and safety glasses. The difficulty depends on your car's make and model, as the sensor's location can range from easy to access near the oil filter to difficult, requiring you to remove other parts to reach it. 
Before you start

• Verify the issue: Before replacing the sensor, confirm it's the cause of the problem and not something else, like low oil level or incorrect viscosity. 
• Gather your tools: You will need safety glasses, a jack, jack stands, wheel chocks, a socket and ratchet set, an oil pressure sensor socket (if needed), and a new sensor. A torque wrench is necessary for proper installation on many vehicles. 
• Locate the sensor: The sensor is usually located near the back and top of the engine, sometimes near the oil filter housing. 

Step-by-step replacement

1. Safety first: Put on safety glasses. Disconnect the negative battery cable, engage the parking brake, and chock the rear wheels. 
2. Lift the vehicle: Safely raise the vehicle with a jack and support it with jack stands. 
3. Disconnect the connector: Locate the electrical connector on the sensor and carefully disconnect it by pressing the tab and pulling it off. 
4. Remove the old sensor: 
   • Place a catch pan underneath to catch any dripping oil. 
   • Use the correct socket and a ratchet to unscrew the old sensor, turning it counter-clockwise. A special oil pressure sensor socket is often needed. 
   • If there's a small filter screen at the sensor's base, remove it with a pick. 
5. Install the new sensor: 
   • Hand-thread the new sensor to ensure it's not cross-threaded. 
   • Tighten it to the manufacturer's specified torque with a torque wrench. 
   • If using Teflon tape on the threads, wrap it in the proper direction. 
6. Reconnect and test:
   • Reconnect the electrical connector. 
   • Lower the vehicle.
   • Start the engine and check for oil leaks around the new sensor. 
   • Check if the oil pressure gauge reading is correct and the low-pressure light is off. 

This video demonstrates the symptoms of a bad oil pressure sensor: 53sEasyAutoFixYouTube · Dec 21, 2021