U0420 Code - Invalid Data Received From Power Steering Control Module
Quick Answer
A Controller Area Network (CAN) is a vehicle bus standard designed to interconnect automotive devices without a host computer. Common causes include Faulty Power Steering Control Module, Power Steering Control Module harness is open or shorted, Power Steering Control Module 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
- U0420 indicates Invalid Data Received From Power Steering Control Module.
- Common causes
- Common causes include Faulty Power Steering Control Module, Power Steering Control Module harness is open or shorted, Power Steering Control Module 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.
Code U0420 Description
What are the Possible Causes of the DTC U0420?
- Faulty Power Steering Control Module
- Power Steering Control Module harness is open or shorted
- Power Steering Control Module circuit poor electrical connection
How to Fix the DTC U0420?
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 U0420 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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Information for Specific Makes
- U0420 Buick — Invalid Data Received From Power Steering Control Module
- U0420 Cadillac — Invalid Data Received From Power Steering Control Module
- U0420 Chevrolet — Invalid Data Received From Power Steering Control Module
- U0420 Ford — Invalid Data Received From Power Steering Control Module
- U0420 GMC — Invalid Data Received From Power Steering Control Module
- U0420 Lincoln — Invalid Data Received From Power Steering Control Module
- U0420 Mercury — Invalid Data Received From Power Steering Control Module
Frequently Asked Questions about U0420 Code
1. What are the common symptoms of OBDII code U0420 - Invalid Data Received From Power Steering Control Module?
- Common symptoms include difficulty steering, loss of power steering assistance, illuminated power steering warning light on the dashboard, and erratic steering behavior.
2. What are the possible causes of OBDII code U0420?
- The code U0420 can be caused by issues such as a faulty power steering control module, damaged wiring or connectors in the power steering system, low voltage in the system, or a communication error between modules.
3. How can I diagnose the OBDII code U0420?
- Diagnosing the code typically involves using a diagnostic scanner to retrieve the specific code and related data. Further testing may be required to inspect the power steering control module, wiring, connectors, and other components in the power steering system.
4. Can I still drive my vehicle with the U0420 code present?
- It is not recommended to drive the vehicle with the U0420 code, as it can affect the performance and safety of the power steering system. It is best to address the issue promptly to avoid potential complications.
5. How can I repair the OBDII code U0420?
- Repairing the U0420 code may involve troubleshooting and fixing the underlying issue causing the invalid data communication. This can include repairing or replacing the power steering control module, addressing wiring or connector issues, and ensuring proper voltage supply.
6. Is it safe to continue driving if the power steering assistance is lost due to code U0420?
- It is not safe to drive without power steering assistance, as it can make steering difficult and compromise vehicle control. It is recommended to address the issue promptly to restore proper power steering function.
7. Can a DIY enthusiast fix the U0420 code at home?
- While some basic troubleshooting steps can be performed at home, diagnosing and repairing the U0420 code may require specialized tools and expertise. It is recommended to seek assistance from a qualified mechanic or technician for proper diagnosis and repair.
8. Will resetting the OBDII code U0420 make it go away permanently?
- Simply resetting the code may temporarily clear the warning light, but if the underlying issue causing the code is not addressed, it is likely to reappear. It is important to diagnose and repair the root cause of the code for a permanent solution.
9. How much does it typically cost to repair the U0420 code?
- The cost of repairing the U0420 code can vary depending on the specific issue causing the code, the extent of repairs needed, and labor rates in your area. It is advisable to get a diagnosis from a mechanic to receive an accurate cost estimate.
10. Can the U0420 code be related to other system malfunctions in the vehicle?
- Yes, the U0420 code can be related to other system malfunctions, especially if it involves communication errors between modules. It is important to address the U0420 code promptly to prevent potential cascading issues in the vehicle's systems.
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