2021 Mitsubishi Outlander PHEV Is Leaking Oil

Discovering the Causes of Oil Leaks in Your 2021 Mitsubishi Outlander PHEV and How to Address Them

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Reviewed by
Andrew Hajjar
Written by RepairPal Car Genius
Updated January 14, 2025
0%
80% chance it's the
Oil System Components
0%
20% chance it's the
Engine Gaskets
The most common reasons a 2021 Mitsubishi Outlander PHEV is leaking oil are oil system component failure and leaking engine gaskets.
  • Oil System Components: A worn or damaged oil pump or filter can lead to low oil pressure, resulting in inadequate lubrication and potential engine damage.
  • Engine Gaskets: A worn or damaged engine gasket can lead to oil or coolant leaks, resulting in engine overheating or loss of lubrication.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

How much does it cost to fix a 2021 Mitsubishi Outlander PHEV is leaking oil?

Common Repairs

The total repair cost will vary based on the condition of your vehicle and the number of repairs needed to fix your symptom. Proper diagnosis will save you money by finding the exact repairs needed to fix your car right the first time.

Oil pans don't wear out or break like other parts, they generally only need to be replaced because of external damage from an accident or an improperly tightened drain plug. The main symptom you will experience is an oil leak underneath the engine of your car. The oil that leaks from a damaged oil pan will range from dark brown to dark black. If the leak is large enough or occurs for long enough the oil level will be low enough to turn the oil pressure or low oil level warning light on.

The engine oil pressure warning light will come on if the engine oil pressure is low, or if the oil pressure sensor is faulty. In either case, engine power may be reduced significantly. The check engine light may also illuminate, and an on-board diagnostic (OBD) trouble code will be stored in the vehicle's computer.

What are the initial diagnostic steps to take for an oil leak in a 2021 Mitsubishi Outlander PHEV?

When faced with an oil leak in your 2021 Mitsubishi Outlander PHEV, start by locating the source of the leak, which is crucial for effective resolution. Begin by inspecting the area beneath the vehicle for any visible oil spots or puddles, as well as checking the engine bay for any signs of oil residue. Next, verify the oil levels in the engine; low oil levels can indicate a significant leak that requires immediate attention. Carefully examine the gaskets and seals, particularly the oil pan gasket, valve cover gasket, and oil filter housing gasket, as these are common culprits for leaks. Additionally, inspect the oil cooler lines and hoses for any damage or loose connections that could be contributing to the issue. Don’t forget to check the oil filter to ensure it is securely installed and not leaking. If you have access to a diagnostic scanner, use it to check for any error codes related to the oil system, which can provide further insights. If these steps do not lead to a clear diagnosis, or if the problem appears complex, it may be wise to consult a professional mechanic for a thorough evaluation. By following this structured diagnostic approach, you can effectively identify and address the oil leak in your vehicle.

What are the common causes of oil leaks in a 2021 Mitsubishi Outlander PHEV?

Understanding the common causes of oil leaks in your 2021 Mitsubishi Outlander PHEV is essential for maintaining your vehicle's health and performance. One prevalent issue is a degraded or damaged oil pan gasket, which can deteriorate over time, leading to leaks. Additionally, worn-out oil seals, often found in the engine, can also contribute to oil leakage. It's crucial to check the oil filter as well; a loose or damaged filter can result in oil escaping from the filter housing. Furthermore, inspect for any cracks in engine components, as these can create pathways for oil to leak. Lastly, a faulty oil drain plug, whether due to improper tightening or damaged threads, can also be a source of leaks. Regular inspections and prompt attention to these areas can help prevent significant engine damage and ensure your Outlander PHEV runs smoothly.

How urgent is it to address the oil leak in my 2021 Mitsubishi Outlander PHEV?

Addressing an oil leak in your 2021 Mitsubishi Outlander PHEV is not just a matter of routine maintenance; it is an urgent issue that requires immediate attention. Failing to fix an oil leak can lead to severe engine damage due to inadequate lubrication, which is essential for the smooth operation of critical engine components. Over time, this neglect can result in decreased engine performance, increased fuel consumption, and even overheating, all of which can significantly impact your vehicle's efficiency and longevity. Moreover, an oil leak poses a safety risk, as it can create slippery conditions on the road, heightening the chances of accidents. Therefore, it is crucial to prioritize the repair of any oil leaks to safeguard both your vehicle's performance and your safety on the road.

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