AutoCodes – Generic – C1521

C1521 Code - Power Steering Short in Motor Circuit

Quick Answer

The Power Steering ECU monitors itself for proper operation. Common causes include Faulty Power Steering ECU, Power Steering ECU harness is open or shorted, Power Steering ECU 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: C1521 indicates Power Steering Short in Motor Circuit.
Common causes: Common causes include Faulty Power Steering ECU, Power Steering ECU harness is open or shorted, Power Steering ECU 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.

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Code Popularity 5,749

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jan 31, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C1521 Description

The Power Steering ECU monitors itself for proper operation. The Power Steering ECU sets the Diagnostic Trouble Code (DTC) when it detects an internal malfunction. If the Power Steering ECU Assembly stores this DTC, it will shut off the motor relay circuit (built into the Power Steering ECU Assembly) and stop power assist. However, power assist continues if this DTC is output.

OBDII Code C1521 - Power Steering Short in Motor Circuit - AutoCodes.com — C1521 Code - Power Steering Short in Motor Circuit

What does this mean?

What are the Possible Causes of the DTC C1521?

Faulty Power Steering ECU
Power Steering ECU harness is open or shorted
Power Steering ECU circuit poor electrical connection

How to Fix the DTC C1521?

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 C1521 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 C1521 code?

Need more information on how to fix the C1521 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1521 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

C1521 Lexus — Power Steering Short in Motor Circuit
C1521 Scion — Power Steering Short in Motor Circuit
C1521 Toyota — Power Steering Short in Motor Circuit

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 C1521 Code

1. What are common symptoms of OBDII code C1521 (Power Steering Short in Motor Circuit)?

Common symptoms include loss of power steering assistance, difficulty steering, and the illumination of the power steering warning light on the dashboard.

2. What are the possible causes of OBDII code C1521?

Possible causes of this code include a short circuit in the power steering motor circuit, damaged wiring or connectors, a faulty power steering control module, or a malfunctioning power steering motor.

3. How can I diagnose the issue related to OBDII code C1521?

Diagnosing the issue may involve visually inspecting the wiring and connectors for damage, testing the power steering motor, and using a scan tool to retrieve and analyze diagnostic trouble codes.

4. Can I still drive my vehicle with OBDII code C1521 present?

It is not recommended to drive the vehicle with this code present, as it may lead to increased steering effort and potential safety hazards. It is advisable to address the issue promptly.

5. How can I repair OBDII code C1521 on my vehicle?

Repairing this code may involve repairing or replacing damaged wiring or connectors, testing and replacing the power steering motor if necessary, and clearing the code with a scan tool after completing the repairs.

6. Is it possible to reset the OBDII code C1521 without fixing the underlying issue?

While you can clear the code with a scan tool, it is crucial to address the root cause of the problem to prevent the code from reoccurring and ensure the proper functioning of the power steering system.

7. Are there any preventive maintenance tips to avoid OBDII code C1521?

Regularly inspecting the power steering system for any signs of wear or damage, addressing any issues promptly, and following the manufacturer's recommended maintenance schedule can help prevent this code from appearing.

8. Can extreme weather conditions cause OBDII code C1521 to trigger?

Yes, extreme weather conditions such as excessive heat or moisture can potentially damage the wiring or components in the power steering system, leading to the occurrence of this fault code.

9. How long does it typically take to repair OBDII code C1521?

The repair time can vary depending on the specific cause of the code and the extent of the repairs needed. In some cases, it may take a few hours to diagnose and fix the issue.

10. Can a DIY enthusiast with basic automotive knowledge repair OBDII code C1521?

While some aspects of diagnosing and repairing this code may be within reach for experienced DIY enthusiasts, it is recommended to seek professional help, especially when dealing with electrical components and systems to ensure proper repair and safety.