P0483 Subaru Code - Cooling Fan Rationality Check Malfunction
Quick Answer
The electric cooling fan is controlled by the Engine Control Module (ECM) through the cooling fan relay based on inputs from the following components: - The engine coolant temperature (ECT) sensor - The intake air temperature (IAT) sensor - The A/C selector switch - The A/C refrigerant pressure sensor - The vehicle speed sensor (VSS) The ECM controls the cooling fan by grounding the cooling fan control circuit which turns ON the cooling fan relay. Common causes include Faulty fan control relay, Faulty cooling fan, Fan control relay harness is open or shorted. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P0483 Subaru indicates Cooling Fan Rationality Check Malfunction.
- Common causes
- Common causes include Faulty fan control relay, Faulty cooling fan, Fan control relay harness is open or shorted.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P0483 Subaru Description
- The engine coolant temperature (ECT) sensor
- The intake air temperature (IAT) sensor
- The A/C selector switch
- The A/C refrigerant pressure sensor
- The vehicle speed sensor (VSS)
The ECM controls the cooling fan by grounding the cooling fan control circuit which turns ON the cooling fan relay. The cooling fan relay will be commanded ON when the following conditions are met:
- The engine coolant temperature reaches 106°C (223°F) or more.
- The A/C clutch requested.
- The vehicle speed is less than 38 MPH.
The cooling fan relay will be commanded ON regardless of vehicle speed when the following conditions are met:
- The engine coolant temperature is 151°C (304°F) or more.
- The A/C refrigerant pressure is high.
The cooling fan may be commanded ON when the engine is not running under a fan run-on conditions described in the electric cooling fan general description portion of the service manual.
What are the Possible Causes of the DTC P0483 Subaru?
- Faulty fan control relay
- Faulty cooling fan
- Fan control relay harness is open or shorted
- Fan control relay circuit poor electrical connection
- Fan cooling fan harness is open or shorted
- Fan cooling fan circuit poor electrical connection
How to Fix the DTC P0483 Subaru?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0483 Subaru code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
Need more information about the P0483 Subaru code?
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Frequently Asked Questions about P0483 Subaru Code
1. What are the common symptoms of OBDII code P0483 in a Subaru related to the Cooling Fan Rationality Check Malfunction?
The common symptoms include the cooling fan running continuously, the cooling fan not running at all, or the cooling fan running at the wrong times.
2. What are the possible causes of OBDII code P0483 in a Subaru?
Possible causes of this code include a faulty cooling fan relay, a malfunctioning cooling fan control module, a damaged cooling fan, or issues with the wiring or connectors in the cooling fan circuit.
3. How can I diagnose the OBDII code P0483 in my Subaru?
To diagnose this code, you can use an OBDII scanner to read the code and identify the issue. Additionally, you can inspect the cooling fan relay, control module, fan, and associated wiring for any visible damage.
4. What are some repair tips for fixing OBDII code P0483 in a Subaru?
Some repair tips include checking and replacing a faulty cooling fan relay or control module, inspecting and replacing a damaged cooling fan, and ensuring all wiring and connectors in the cooling fan circuit are secure and functioning properly.
5. Can I continue driving my Subaru with OBDII code P0483 present?
It is not recommended to drive your Subaru with this code present, as it can lead to overheating issues and potential damage to the engine. It is best to address the issue promptly.
6. How much does it typically cost to repair OBDII code P0483 in a Subaru?
The cost of repairing this code can vary depending on the specific cause of the issue and the labor rates in your area. It is advisable to get a diagnosis from a qualified mechanic to determine the exact cost.
7. Are there any preventative measures I can take to avoid OBDII code P0483 in my Subaru?
Regularly inspecting the cooling fan system for any signs of wear or damage, ensuring proper maintenance of the cooling fan components, and addressing any cooling system issues promptly can help prevent this code from occurring.
8. Can a DIY enthusiast fix OBDII code P0483 in a Subaru?
Depending on your skill level and access to tools, a DIY enthusiast may be able to address this code by replacing components like the cooling fan relay or control module. However, more complex issues may require professional assistance.
9. Will resetting the OBDII code P0483 in my Subaru make the issue go away?
Resetting the code may temporarily turn off the check engine light, but it will not fix the underlying issue causing OBDII code P0483. It is essential to diagnose and address the root cause of the problem.
10. How long does it typically take to repair OBDII code P0483 in a Subaru?
The repair time can vary based on the specific cause of the issue and the availability of parts. Simple repairs like replacing a relay may take a short time, while more complex issues may require more labor and diagnostic time.
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