2015 Cadillac ATS Is Leaking Oil

Discovering the Causes of Oil Leaks in Your 2015 Cadillac ATS and How to Resolve Them Effectively

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Reviewed by
Devin Cabugcal
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 2015 Cadillac ATS 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 2015 Cadillac ATS 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.

A bad oil level sensor may cause a false reading of the engine oil level. The oil level warning light may illuminate even when the oil level (checked manually) is within an acceptable range. The warning light may also come on and off intermittently if the sensor is faulty. An error code may be sent to the PCM and a check engine light may come on the dashboard as well if the sensor is bad.

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 steps to diagnose the oil leak in a 2015 Cadillac ATS?

To effectively diagnose an oil leak in your 2015 Cadillac ATS, start by visually inspecting the engine and the area beneath the vehicle for any signs of oil accumulation or drips. This initial step helps you locate the general area of the leak. Next, check the oil level using the dipstick; a significant drop may indicate a leak that needs immediate attention. Pay close attention to the gaskets and seals around critical components like the oil pan and valve cover, as these are common culprits for leaks. Additionally, inspect the oil filter for any signs of damage or leakage, as a faulty filter can also contribute to oil loss. Don’t forget to check the drain plug; ensure it is securely tightened, as a loose plug can lead to leaks. If the source of the leak remains elusive, consider performing a pressure test to help identify the exact location. Should you find the process overwhelming or the issue complex, seeking assistance from a professional mechanic is a wise choice to ensure proper diagnosis and repair. By following these steps, you can confidently tackle the task of diagnosing an oil leak in your Cadillac ATS.

What are the common causes of oil leaks in a 2015 Cadillac ATS?

Understanding the common causes of oil leaks in a 2015 Cadillac ATS is crucial for any DIY owner looking to maintain their vehicle's performance. One of the primary culprits is oil system component failure, which can manifest in various ways, including leaks from the oil pan or gasket. Additionally, oil seepage near engine components, particularly around the water pump, can lead to noticeable leaks that require immediate attention. It's also important to consider the impact of high Long Term Fuel Trim (LTFT) values at idle, as these can indicate underlying vacuum leaks that may exacerbate oil leakage. Addressing these vacuum leaks promptly is essential to prevent further complications. Regular maintenance and thorough inspections are key strategies for early detection, allowing owners to tackle potential issues before they escalate into more significant problems. By staying vigilant and informed about these common causes, Cadillac ATS owners can effectively manage oil leaks and ensure their vehicle remains in optimal condition.

How urgent is it to address the oil leak in my 2015 Cadillac ATS?

Addressing an oil leak in your 2015 Cadillac ATS is not just a matter of routine maintenance; it is a pressing issue that requires immediate attention. An oil leak can significantly reduce the oil levels in your engine, leading to inadequate lubrication of vital components. This lack of lubrication can cause severe wear and tear, ultimately resulting in costly engine damage. Furthermore, neglecting an oil leak can lead to overheating, which not only risks engine failure but also poses a serious safety hazard. Leaking oil can drip onto hot engine parts, creating a fire risk that could endanger both you and your vehicle. Therefore, it is crucial to act swiftly and address any signs of an oil leak to safeguard your engine's health and ensure your safety on the road.

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2015 Cadillac ATS Oil Leak Issues & Repair Costs | RepairPal