Why does my oil light keep coming on even though my oil is full?
As a car owner, seeing the oil light illuminate on your dashboard can be a cause for concern, especially when you’ve just checked and confirmed that your oil level is full. Understanding the reasons behind this warning light is crucial for maintaining your vehicle's health and ensuring safe driving. In this article, we will explore the potential causes of a persistent oil light and what steps you can take to address the issue.
Common Reasons for an Illuminated Oil Light
Even if your oil level is adequate, there are several reasons why your oil light may still be on:
- Oil Pressure Issues: The oil light is primarily an indicator of oil pressure, not just oil level. If the oil pump is malfunctioning or if there is a blockage in the oil passages, it can lead to low oil pressure, triggering the light.
- Faulty Oil Pressure Sensor: Sometimes, the oil pressure sensor itself may be faulty. If it sends incorrect signals to the dashboard, it can cause the oil light to illuminate even when everything is functioning properly.
- Oil Quality: Old or degraded oil can lose its viscosity, which may affect the oil pressure. If your oil hasn’t been changed in a while, it might be time for a replacement.
- Leaking Oil: Even if your oil level appears full, a leak can cause a drop in oil pressure. Check for any signs of oil spots under your vehicle or around the engine.
- Engine Overheating: An overheating engine can cause oil to thin out, leading to decreased oil pressure. This can trigger the oil light as well.
What to Do If Your Oil Light Is On
If your oil light remains illuminated despite having a full oil level, it’s important to take action promptly. Here are some steps you can follow:
- Check the Oil Pressure: Use an oil pressure gauge to check the actual oil pressure in your engine. This will help determine if the issue is with the oil pressure sensor or the oil system itself.
- Inspect for Leaks: Look under your vehicle for any signs of oil leaks. If you find any, it’s essential to have them repaired as soon as possible.
- Change the Oil: If it’s been a while since your last oil change, consider changing the oil and filter. Fresh oil can help restore proper pressure and performance.
- Consult a Professional: If you’re unable to determine the cause of the oil light, it’s best to consult a qualified mechanic. They can perform a thorough diagnostic to identify and resolve the issue.
Conclusion
Seeing your oil light come on can be alarming, but understanding the potential causes can help you address the issue effectively. Always prioritize regular maintenance and inspections to keep your vehicle running smoothly. If you’re ever in doubt, don’t hesitate to reach out to a professional for assistance. At Kevin's Autos, we’re here to help you with all your auto service needs!
Frequently Asked Questions
Why is my oil light still on after putting oil in then?
The oil pressure light will stay on for a few seconds longer than normal during the first engine start after an oil change. That is normal. It takes a couple of seconds for the oil pump to pressurize the system and fill the oil filter. Your engine is not being damaged during this short time period.
How much does it cost to replace an oil pressure sensor?
between $148 and $167
The average cost for an Oil Pressure Sensor Replacement is between $148 and $167. Labor costs are estimated between $75 and $95 while parts are typically priced around $72. This range does not include taxes and fees, and does not factor in your unique location. Related repairs may also be needed.
Why is my oil pressure light on but my oil is good?
Sometimes, the issue could be as simple as a faulty oil pressure sensor, it could also be a more serious problem like a malfunctioning oil pump or a clogged oil pickup or filter.
What are the signs of a failing oil pump?
Between moving parts which is why you're hearing the engine noise. The fourth symptom of a bad oil pump is a no start you'll crank the engine. But nothing happens. Now this doesn't occur to all cars.
What causes an oil level sensor to go bad?
When the engine oil level becomes too low, the sensor will either close a circuit or transmit an electronic signal to a module (BCM, PCM, etc.). As time passes, this part can fail prematurely.
Why is my engine oil light still on after filling?
How much oil did you add? If you added enough oil and the light is still on, it is possible your oil level sensor is malfunctioning and needs to be replaced. It's best to buy a physical oil dipstick to verify the actual oil level.
How much does it cost to replace an oil pump?
Labor costs are estimated between $796 and $1,004 while parts are priced between $442 and $448. This range does not include taxes and fees, and does not factor in your unique location. Related repairs may also be needed. For a more accurate estimate based on your location, use our Fair Price Estimator below.
Why is my oil light on but my oil is full?
Issue with the Oil Pressure Sensor or Wiring
If there's a fault in your oil pressure sensor or wiring, it can send inaccurate signals to the ECU, causing the light to blink. Check your sensor and wiring issues weekly to avoid this problem.
