AutoCodes – Subaru – P1520 Subaru

P1520 Subaru Code - Radiator Fan Relay 1 Circuit High Input

Quick Answer

P1520 Subaru indicates Radiator Fan Relay 1 Circuit High Input. Common causes include Faulty Radiator Fan Relay 1, Radiator Fan Relay 1 harness is open or shorted, Radiator Fan Relay 1 circuit poor electrical connection. 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 1, Radiator Fan Relay 1 harness is open or shorted, Radiator Fan Relay 1 circuit poor electrical connection.
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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 7,116
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Aug 27, 2019
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Code P1520 Subaru Description

OBDII Code P1520 Subaru - Radiator Fan Relay 1 Circuit High Input - AutoCodes.com
P1520 Subaru Code - Radiator Fan Relay 1 Circuit High Input

What are the Possible Causes of the DTC P1520 Subaru?

  • Faulty Radiator Fan Relay 1
  • Radiator Fan Relay 1 harness is open or shorted
  • Radiator Fan Relay 1 circuit poor electrical connection

How to Fix the DTC P1520 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 P1520 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.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

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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