Engine-Codes.com
Engine-Codes – Ford – U0420 Ford

U0420 Ford Code - Invalid Data Received From Power Steering Control Module

Quick Answer

The U0420 diagnostic trouble code (DTC) for Ford vehicles indicates that the Engine Control Module (ECM) has detected invalid data from the Power Steering Control Module. Common causes include Faulty Power Steering Control Module, Wiring or connection issues between the ECM and Power Steering Control Module, Corrosion or damage to electrical connectors. 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
U0420 Ford indicates Invalid Data Received From Power Steering Control Module.
Common causes
Common causes include Faulty Power Steering Control Module, Wiring or connection issues between the ECM and Power Steering Control Module, Corrosion or damage to electrical connectors.
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.
What is this?
Table of contents Created and updated by William Orellana on Aug 30, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code U0420 Ford Description

The U0420 diagnostic trouble code (DTC) for Ford vehicles indicates that the Engine Control Module (ECM) has detected invalid data from the Power Steering Control Module. This typically means that there is a communication error between the ECM and the Power Steering Control Module, which can lead to issues with the power steering system. The power steering control module is responsible for assisting the driver in steering the vehicle, so any communication errors can potentially affect the vehicle's handling and overall performance.

OBDII Code U0420 Ford - Invalid Data Received From Power Steering Control Module
U0420 Ford Code - Invalid Data Received From Power Steering Control Module

Common Causes of U0420 Ford

  1. Faulty Power Steering Control Module
  2. Wiring or connection issues between the ECM and Power Steering Control Module
  3. Corrosion or damage to electrical connectors
  4. Software issues or programming errors
  5. Issues with the ECM itself

Symptoms of U0420 Ford

  1. Loss of power steering assistance
  2. Stiff or difficult steering
  3. Erratic steering behavior
  4. Illumination of the power steering warning light
  5. Illumination of the check engine light

How to Fix U0420 Ford

  1. Perform a diagnostic scan to retrieve the trouble codes and identify the specific issue.
  2. Inspect the wiring and connectors between the ECM and Power Steering Control Module for any damage or corrosion.
  3. Test the Power Steering Control Module for proper functioning and replace if necessary.
  4. Clear the DTC and reset the system to see if the issue reoccurs.
  5. If the problem persists, further diagnostics may be required to pinpoint the root cause of the communication error.

Cost to Fix U0420 Ford

The cost of repairing a U0420 code for an invalid data received from the power steering control module can vary depending on the actual cause of the issue. In general, you can expect to pay between $200 and $500 for parts and labor. Keep in mind that labor rates at auto repair shops can range from $80 to $150 per hour. It's recommended to get a detailed estimate from a qualified mechanic to determine the exact cost for your specific vehicle.

Need more information about the U0420 Ford code?

Need more information on how to fix the U0420 Ford code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U0420 Ford code diagnosed by a professional: Find a repair shop in your area

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 U0420 Ford Code

1. What are common symptoms of the OBDII code U0420 in a Ford related to the Power Steering Control Module?

The common symptoms include loss of power steering assistance, illuminated power steering warning light on the dashboard, and difficulty in steering the vehicle.

2. What are the possible causes of the U0420 code in a Ford indicating "Invalid Data Received From Power Steering Control Module"?

Possible causes include a faulty power steering control module, damaged wiring or connectors in the power steering system, software issues, or electronic communication problems.

3. How can I diagnose the U0420 code in a Ford related to the Power Steering Control Module?

Diagnosing the U0420 code typically involves using an OBDII scanner to retrieve the code, checking for any related codes or warning lights, inspecting the power steering system components, and testing the power steering control module for faults.

4. What should I do if I encounter the U0420 code in a Ford with a message "Invalid Data Received From Power Steering Control Module"?

If you encounter the U0420 code, it is advisable to have the power steering system inspected by a qualified mechanic to determine the exact cause of the issue and perform any necessary repairs or replacements.

5. Can I continue driving my Ford if the U0420 code related to the Power Steering Control Module appears?

It is not recommended to continue driving your Ford if the U0420 code is present, as it indicates a potential issue with the power steering system that could compromise the safety and performance of the vehicle.

6. Are there any DIY repair tips for fixing the U0420 code in a Ford with an error message "Invalid Data Received From Power Steering Control Module"?

DIY repair tips for the U0420 code may include checking and securing the wiring connections in the power steering system, resetting the power steering control module, or updating the software to address communication issues.

7. How much does it typically cost to repair the U0420 code in a Ford related to the Power Steering Control Module?

The cost of repairing the U0420 code can vary depending on the exact cause of the issue, but it may involve costs for parts replacement, labor, and diagnostic fees, which could range from a few hundred to over a thousand dollars.

8. Can a power steering fluid leak cause the U0420 code to appear in a Ford?

While a power steering fluid leak may not directly cause the U0420 code, it can lead to related issues in the power steering system that may trigger the code. It's important to address any leaks promptly to prevent further damage.

9. Is it safe to clear the U0420 code related to the Power Steering Control Module using an OBDII scanner without addressing the underlying issue?

Clearing the U0420 code without addressing the underlying issue may temporarily remove the warning light, but the problem will likely reoccur. It is essential to diagnose and fix the root cause to ensure the safety and reliability of the power steering system.

10. How can regular maintenance help prevent the U0420 code in a Ford associated with the Power Steering Control Module?

Regular maintenance, including inspecting the power steering system, checking for leaks, and keeping the system well-lubricated, can help prevent issues that may lead to the U0420 code. Addressing any minor problems early can prevent more significant issues down the road.

Discuss the causes and fixes for U0420 Ford OBDII Code

Submit a New Comment

Code U0420 Ford comments

No comments found for this page.