AutoCodes – Generic – C1645

C1645 Code - Power Steering Control System Failure

Quick Answer

This Diagnostic Trouble Code (DTC) is stored when the Parking Assist ECU receives a malfunction signal from the power steering system via CAN communication. Common causes include Faulty Power Steering 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: C1645 indicates Power Steering Control System Failure.
Common causes: Common causes include Faulty Power Steering 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 Popularity 3,232

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 Nov 15, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C1645 Description

This Diagnostic Trouble Code (DTC) is stored when the Parking Assist ECU receives a malfunction signal from the power steering system via CAN communication.

OBDII Code C1645 - Power Steering Control System Failure - AutoCodes.com — C1645 Code - Power Steering Control System Failure

What does this mean?

What are the Possible Causes of the DTC C1645?

Faulty Power Steering System

How to Fix the DTC C1645?

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 C1645 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 C1645 code?

Need more information on how to fix the C1645 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1645 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

C1645 Lexus — Power Steering Control System Failure
C1645 Toyota — Power Steering Control System Failure

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 C1645 Code

1. What are the common symptoms of OBDII code C1645 (Power Steering Control System Failure)?

- Common symptoms include difficult steering, stiff or unresponsive steering wheel, and the power steering warning light illuminated on the dashboard.

2. What are the possible causes of OBDII code C1645?

- Possible causes include a faulty power steering control module, damaged wiring or connectors in the power steering system, low power steering fluid levels, or a malfunctioning power steering pump.

3. How can I diagnose OBDII code C1645?

- Diagnosing this code typically involves using a diagnostic scanner to retrieve the trouble codes, checking the power steering system components for any visible damage or leaks, and testing the power steering control module for proper functionality.

4. Can I still drive my vehicle with OBDII code C1645?

- It is not recommended to drive your vehicle with OBDII code C1645 as it can affect the safe operation of your power steering system, potentially leading to difficulty in controlling the vehicle.

5. How can I repair OBDII code C1645?

- Repairing this code may involve replacing the power steering control module, repairing or replacing damaged wiring or connectors, ensuring proper power steering fluid levels, or repairing/replacing the power steering pump as needed.

6. Is it possible to reset OBDII code C1645 without fixing the underlying issue?

- While you can clear the trouble codes using a diagnostic scanner, it is crucial to address the root cause of the code to prevent it from reoccurring and ensure the proper functioning of the power steering system.

7. How much does it typically cost to repair OBDII code C1645?

- The cost of repairing OBDII code C1645 can vary depending on the specific cause of the issue, the extent of the damage, and labor rates in your area. It is recommended to consult with a professional mechanic for an accurate estimate.

8. Are there any maintenance tips to prevent OBDII code C1645 from occurring?

- Regularly checking and maintaining your power steering system, including monitoring power steering fluid levels, inspecting for leaks or damage, and addressing any unusual steering behavior promptly, can help prevent OBDII code C1645.

9. Can extreme weather conditions contribute to triggering OBDII code C1645?

- Extreme weather conditions, such as extreme cold or heat, can potentially affect the performance of the power steering system components and contribute to triggering OBDII code C1645. Ensuring proper maintenance can help mitigate these effects.

10. Can OBDII code C1645 be a safety concern?

- Yes, OBDII code C1645 can be a safety concern as it affects the proper functioning of the power steering system, which is essential for controlling the vehicle. It is crucial to address this code promptly to ensure safe driving conditions.