2022 Toyota Prius Radiator Fan Isn't Working

Diagnosing the Causes of a Non-Functional Radiator Fan in Your 2022 Toyota Prius and How to Fix It

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Reviewed by
Bo Fader
Written by RepairPal Car Genius
Updated January 14, 2025
0%
34% chance it's the
Fan Motor or Clutch
0%
28% chance it's the
Fan Relay or Fuse
0%
23% chance it's the
Temp Sensor or Fan Control Module
0%
15% chance it's
Something else
The most common reasons a 2022 Toyota Prius radiator fan isn't working are the fan assembly, the fan clutch, or the coolant temperature sensor.
  • Fan Motor or Clutch: A faulty fan motor or a malfunctioning fan clutch can result in inadequate cooling, causing the engine to overheat.
  • Fan Relay or Fuse: A faulty fan relay or blown fuse can prevent the cooling fan from operating, leading to engine overheating.
  • Temp Sensor or Fan Control Module: A faulty temperature sensor or fan control module can result in incorrect readings, causing the engine to overheat or the cooling fan to operate improperly.
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 2022 Toyota Prius radiator fan isn't working?

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.

The bad thermostat can cause two different sets of problems, depending on whether it's stuck open or stuck closed.

A thermostat that is stuck open can cause the engine to run colder than normal and turn on the check engine light. It may also cause poor fuel mileage and the heater to blow cool air.

A thermostat that is stuck closed will cause the vehicle to overheat. If a new thermostat doesn't resolve engine temperature problems, the cooling system needs to be checked for other issues.

» LEARN MORE: Signs of a bad thermostat, and how to fix it

When the engine coolant temperature sensor fails, it will send inaccurate information to the vehicle’s computer, causing the computer to react to false operating conditions. This will cause the engine to consume more fuel than normal, depleting fuel mileage, and causing black, sooty smoke from the engine under moderate to heavy acceleration. The check engine light will illuminate, and on-board diagnostic trouble codes may be stored for exhaust and emission system failure, fuel delivery system failure, and engine cooling system failure. Overheating may also occur, as the coolant sensor may be leaking fluid out of the engine, creating a an air pocket in the system.

What are the steps to diagnose the non-functioning radiator fan in a 2022 Toyota Prius?

When diagnosing a non-functioning radiator fan in a 2022 Toyota Prius, it's essential to adopt a methodical approach that begins with the most straightforward solutions. Start by checking the fuse associated with the radiator fan, as a blown fuse is a common and easily fixable issue. If the fuse is intact, proceed to inspect the relay that controls the fan; a malfunctioning relay can disrupt the fan's operation. Next, test the radiator fan motor itself to determine if it is working correctly, as a defective motor will require replacement. Additionally, examine the wiring connected to the fan for any signs of damage or loose connections, as these can impede power delivery. Utilizing a diagnostic scanner to check for error codes can provide further insights into the fan system's status. Finally, monitor the coolant temperature gauge while the vehicle is running; a rapid increase in temperature without the fan activating may indicate a problem. By following this structured diagnostic approach, you can effectively identify and address the issue with your Prius's radiator fan.

What are the common problems that could cause the radiator fan to stop working in a 2022 Toyota Prius?

When diagnosing why the radiator fan in a 2022 Toyota Prius has stopped working, it's essential to consider several common problems that could be at play. A faulty fan motor is often the primary culprit, as it can fail to spin, leading to overheating. Additionally, a blown fuse in the fan circuit can interrupt the power supply, preventing the fan from operating altogether. Another potential issue is a defective temperature sensor, which may fail to signal the fan to activate when the engine reaches a certain temperature. Worn or damaged fan blades can also hinder airflow, compromising the cooling system's efficiency. Furthermore, electrical issues such as loose wiring or corroded terminals can disrupt the fan's functionality. Lastly, coolant leaks that result in low coolant levels can cause the engine to overheat, which may affect the radiator fan's performance. By systematically checking these areas, DIYers can effectively troubleshoot and restore the radiator fan's operation, ensuring the vehicle maintains optimal engine cooling and performance.

How urgent is it to repair the non-working radiator fan in a 2022 Toyota Prius?

When it comes to the radiator fan in your 2022 Toyota Prius, addressing any malfunction should be a top priority. The radiator fan is essential for maintaining optimal engine temperature by effectively dissipating heat. If the fan is not functioning, the engine is at risk of overheating, which can lead to severe damage, including warped cylinder heads or complete engine failure. This risk is particularly heightened in hot weather or during stop-and-go traffic, where the engine generates more heat. Additionally, a malfunctioning fan may trigger warning lights on your dashboard, serving as a critical alert that immediate action is required. Ignoring these symptoms can lead to costly repairs down the line, making it imperative to repair the radiator fan as soon as possible. By taking prompt action, you not only protect your vehicle's engine but also ensure a safer driving experience.

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2022 Toyota Prius Radiator Fan Issues: Symptoms & Repairs