P1520 Subaru Code - Radiator Fan Relay 1 Circuit High Input
Quick Answer
The P1520 diagnostic trouble code for Subaru vehicles indicates a problem with the radiator fan relay 1 circuit having a high input. Common causes include Faulty radiator fan relay: A common cause of this code is a faulty radiator fan relay that is not sending the correct signals to the radiator fan, Wiring or connector issues: Problems with the wiring or connectors in the circuit can also trigger this code, affecting the flow of electrical signals to the radiator fan relay, Engine coolant temperature sensor malfunction: If the engine coolant temperature sensor is not working correctly, it may not send accurate temperature readings to the radiator fan relay, causing issues with the cooling system. 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
- P1520 Subaru indicates Radiator Fan Relay 1 Circuit High Input.
- Common causes
- Common causes include Faulty radiator fan relay: A common cause of this code is a faulty radiator fan relay that is not sending the correct signals to the radiator fan, Wiring or connector issues: Problems with the wiring or connectors in the circuit can also trigger this code, affecting the flow of electrical signals to the radiator fan relay, Engine coolant temperature sensor malfunction: If the engine coolant temperature sensor is not working correctly, it may not send accurate temperature readings to the radiator fan relay, causing issues with the cooling system.
- 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.
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Code P1520 Subaru Description
The P1520 diagnostic trouble code for Subaru vehicles indicates a problem with the radiator fan relay 1 circuit having a high input. The radiator fan relay is responsible for controlling the operation of the radiator fan, which is crucial for regulating the engine's temperature. When the engine reaches a certain temperature, the radiator fan is supposed to kick in to cool it down. However, if the relay circuit is detecting a high input, it means that there is an issue with the electrical signal being sent to the radiator fan relay.
Common Causes of P1520 Subaru
- Faulty radiator fan relay: A common cause of this code is a faulty radiator fan relay that is not sending the correct signals to the radiator fan.
- Wiring or connector issues: Problems with the wiring or connectors in the circuit can also trigger this code, affecting the flow of electrical signals to the radiator fan relay.
- Engine coolant temperature sensor malfunction: If the engine coolant temperature sensor is not working correctly, it may not send accurate temperature readings to the radiator fan relay, causing issues with the cooling system.
- Blown fuse: A blown fuse in the radiator fan relay circuit can also lead to a high input code, as the electrical signal may be disrupted.
Symptoms of P1520 Subaru
- Engine overheating: One of the most common symptoms associated with this code is engine overheating. If the radiator fan relay is not functioning correctly, the radiator fan may not turn on, leading to overheating of the engine.
- Check Engine Light: The Check Engine Light may illuminate on the dashboard when this code is triggered, indicating a problem with the radiator fan relay circuit.
- Poor air conditioning performance: The air conditioning performance may be affected if the radiator fan is not working correctly, as the engine temperature may rise, impacting the overall cooling system.
- Reduced fuel efficiency: If the engine is running hotter than normal due to a malfunctioning radiator fan relay, it can lead to reduced fuel efficiency as the engine works harder to cool down.
How to Fix P1520 Subaru
- Diagnose the issue: Use a diagnostic scanner to retrieve the trouble code and perform a thorough inspection of the radiator fan relay, wiring, connectors, and engine coolant temperature sensor to pinpoint the exact cause of the problem.
- Replace the radiator fan relay: If the radiator fan relay is found to be faulty, replace it with a new one to restore proper operation of the radiator fan.
- Check and repair wiring/connectors: Inspect the wiring and connectors in the circuit for any damage or corrosion, repairing or replacing any faulty components as needed.
- Test the engine coolant temperature sensor: Test the engine coolant temperature sensor to ensure it is providing accurate readings to the radiator fan relay, replacing it if necessary.
- Clear the trouble code: After completing the repairs, clear the trouble code using a diagnostic scanner and test the vehicle to ensure that the issue has been resolved.
Cost to Fix P1520 Subaru
The typical repair costs for addressing a P1520 Subaru code related to the radiator fan relay circuit high input can vary depending on the specific cause of the issue. Generally, the cost of replacing a radiator fan relay can range from $50 to $200, including parts and labor. If wiring or connectors need to be repaired or replaced, additional costs may apply. In total, the repair for this issue may cost between $100 and $400, but it is advisable to check with local auto repair shops for more accurate estimates, as labor rates and parts prices can vary. Keep in mind that diagnostic time and labor rates at auto repair shops can also impact the overall cost of the repair.
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Frequently Asked Questions about P1520 Subaru Code
1. What are the common symptoms of OBDII code P1520 in a Subaru related to the Radiator Fan Relay 1 Circuit High Input?
- Common symptoms include the radiator fan running constantly at high speed, engine overheating, and the Check Engine Light being illuminated.
2. What are the potential causes of OBDII code P1520 in a Subaru indicating a Radiator Fan Relay 1 Circuit High Input issue?
- Possible causes include a faulty radiator fan relay, a short circuit in the wiring, a malfunctioning temperature sensor, or a problem with the engine control module.
3. How can I diagnose the OBDII code P1520 in my Subaru related to the Radiator Fan Relay 1 Circuit High Input?
- Diagnosis typically involves checking the radiator fan relay operation, inspecting the wiring for any damage or shorts, testing the temperature sensor, and scanning the vehicle's computer for error codes.
4. What are some repair tips for resolving OBDII code P1520 in a Subaru associated with the Radiator Fan Relay 1 Circuit High Input?
- Repair tips may include replacing the radiator fan relay, repairing any damaged wiring, replacing the temperature sensor if needed, and resetting the error code after repairs are completed.
5. Can driving with OBDII code P1520 in a Subaru related to the Radiator Fan Relay 1 Circuit High Input cause further damage to the vehicle?
- Driving with this code may lead to engine overheating and potential damage if the radiator fan is not functioning properly. It is recommended to address the issue promptly to avoid more severe problems.
6. Is it safe to continue driving my Subaru with OBDII code P1520 indicating a Radiator Fan Relay 1 Circuit High Input issue?
- It is not recommended to drive the vehicle with this code active, as it can lead to engine overheating and other complications. It is best to address the problem as soon as possible.
7. Are there any DIY fixes for OBDII code P1520 in a Subaru related to the Radiator Fan Relay 1 Circuit High Input?
- While some basic checks like inspecting the relay and wiring can be done by DIY enthusiasts, diagnosing and repairing electrical issues should be left to professional mechanics to ensure proper resolution.
8. How much does it typically cost to repair OBDII code P1520 in a Subaru associated with the Radiator Fan Relay 1 Circuit High Input?
- The cost of repair can vary depending on the specific issue, parts needed, and labor rates. Generally, it could range from $100 to $300 or more for parts and labor.
9. Will resetting the Check Engine Light eliminate OBDII code P1520 in a Subaru linked to the Radiator Fan Relay 1 Circuit High Input?
- Resetting the Check Engine Light may temporarily turn it off, but if the underlying issue causing the code is not addressed, the light is likely to come back on. It's crucial to diagnose and fix the problem to prevent it from reoccurring.
10. How long does it usually take to repair OBDII code P1520 in a Subaru related to the Radiator Fan Relay 1 Circuit High Input?
- The repair time can vary depending on the exact cause of the issue, availability of parts, and the mechanic's efficiency. In general, it may take a few hours to half a day to diagnose and repair this problem.
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