2015 Chevrolet Malibu Is Overheating

Common Causes of Overheating in Your 2015 Chevrolet Malibu and How to Resolve Them

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Reviewed by
Devin Cabugcal
Written by RepairPal Car Genius
Updated January 14, 2025
0%
24% chance it's the
Thermostat
0%
41% chance it's the
Coolant leak (water pump, radiator, hose etc.)
0%
32% chance it's the
Radiator Fan
0%
3% chance it's
Something else
The most common reasons a 2015 Chevrolet Malibu is overheating are a coolant leak (water pump, radiator, hose etc.), the radiator fan, or a failed thermostat.
  • Thermostat: A faulty thermostat can cause the engine to overheat or run too cool by failing to regulate the flow of coolant properly.
  • Coolant leak (water pump, radiator, hose etc.): A coolant leak can occur due to a damaged hose, a failing water pump, or a compromised radiator, leading to loss of coolant and potential engine overheating.
  • Radiator Fan: A faulty radiator fan can lead to engine overheating due to insufficient airflow over the radiator.
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.

What are the initial diagnostic steps to take for an overheating 2015 Chevrolet Malibu?

When dealing with an overheating 2015 Chevrolet Malibu, it's crucial to follow a structured diagnostic approach to effectively identify and resolve the issue. Begin by checking for coolant leaks, as these can stem from various components like the water pump, radiator, or hoses, which may compromise the cooling system. Next, inspect the radiator fan to ensure it is functioning properly; a faulty fan can lead to inadequate cooling and exacerbate overheating problems. Testing the thermostat is another vital step, as a malfunctioning thermostat can prevent the engine from cooling down effectively. Additionally, confirm that coolant levels are sufficient and that there are no leaks in the system. Finally, utilizing a scanner to check for error codes can reveal underlying issues, such as a defective Engine Coolant Temperature (ECT) sensor. By systematically addressing these areas, you can pinpoint the cause of the overheating and take appropriate measures to restore your vehicle's performance.

What are the common problems that could cause a 2015 Chevrolet Malibu to overheat?

When dealing with overheating issues in a 2015 Chevrolet Malibu, it's crucial to understand the common problems that may be at play. One of the primary culprits is low coolant levels, which can prevent the engine from being adequately cooled, leading to overheating. Additionally, leaks in the cooling system—whether from the radiator, hoses, or water pump—can result in a significant loss of coolant, exacerbating the overheating problem. A faulty thermostat is another potential issue, as it may fail to regulate the flow of coolant properly, causing the engine temperature to rise. Furthermore, a clogged radiator can impede the cooling process, trapping heat and preventing effective temperature regulation. It's also important to consider the cooling fan; if the fan motor or relay is malfunctioning, it can restrict airflow through the radiator, contributing to overheating. Lastly, a failing water pump may not circulate coolant effectively, which is essential for maintaining optimal engine temperature. Addressing these issues promptly is vital to prevent further damage and ensure the reliable performance of your vehicle.

How urgent is it to address the overheating issue in a 2015 Chevrolet Malibu?

Addressing the overheating issue in a 2015 Chevrolet Malibu is not just a matter of convenience; it is a pressing concern that demands immediate attention. Overheating can lead to catastrophic engine damage, which may result in costly repairs or even complete engine failure if left unchecked. The risk of ignoring this problem extends beyond the engine itself, as continuous overheating can compromise other vital components of the vehicle, ultimately affecting its overall performance and safety. Moreover, persistent overheating often signals underlying issues within the cooling system that require prompt resolution to prevent further complications. Therefore, for any DIY enthusiast, it is crucial to prioritize the diagnosis and repair of overheating issues in your Malibu to safeguard your investment and ensure the vehicle operates smoothly and reliably.

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2015 Chevrolet Malibu Overheating: Causes & Repair Costs