U0401 Code - Invalid Data Received From ECM/PCM
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 Engine Control Module (ECM)/Powertrain Control Module (PCM), ECM/PCM harness is open or shorted, ECM/PCM 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
- U0401 indicates Invalid Data Received From ECM/PCM.
- Common causes
- Common causes include Faulty Engine Control Module (ECM)/Powertrain Control Module (PCM), ECM/PCM harness is open or shorted, ECM/PCM 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 U0401 Description
What are the Possible Causes of the DTC U0401?
- Faulty Engine Control Module (ECM)/Powertrain Control Module (PCM)
- ECM/PCM harness is open or shorted
- ECM/PCM circuit poor electrical connection
How to Fix the DTC U0401?
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 U0401 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 U0401 code?
Need more information on how to fix the U0401 code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the U0401 code diagnosed by a professional: Find a repair shop in your area
Information for Specific Makes
- U0401 BMW — Invalid Data Received From ECM/PCM
- U0401 Buick — Invalid Data Received From Engine Control Module
- U0401 Cadillac — Invalid Data Received From Engine Control Module
- U0401 Chevrolet — Invalid Data Received From Engine Control Module
- U0401 Chrysler — Invalid Data Received From ECM/PCM
- U0401 Dodge — Invalid Data Received From ECM/PCM
- U0401 Ford — Invalid Data Received From ECM/PCM
- U0401 GMC — Invalid Data Received From Engine Control Module
- U0401 Infiniti — Invalid Data Received From Engine Control Module
- U0401 Jeep — Invalid Data Received From ECM/PCM
- U0401 Lincoln — Invalid Data Received From ECM/PCM
- U0401 Mercury — Invalid Data Received From ECM/PCM
- U0401 Nissan — Invalid Data Received From Engine Control Module
- U0401 RAM — Invalid Data Received From ECM/PCM
Frequently Asked Questions about U0401 Code
1. What are common symptoms of the OBDII code U0401?
- Common symptoms include the check engine light coming on, rough idling, stalling, and issues with vehicle performance.
2. What causes the OBDII code U0401 to appear?
- The code U0401 is triggered when the engine control module (ECM) or powertrain control module (PCM) receives invalid data from other control modules in the vehicle.
3. How can I diagnose the OBDII code U0401?
- Diagnosing the code U0401 typically involves using a diagnostic scanner to retrieve the trouble codes and then testing the communication between various control modules in the vehicle.
4. What are some potential repair tips for resolving the OBDII code U0401?
- Repair tips may include checking and repairing any damaged wiring or connectors, updating software in control modules, and ensuring all modules are properly communicating with each other.
5. Can a faulty ECM/PCM cause the OBDII code U0401?
- Yes, a faulty ECM/PCM can sometimes cause the U0401 code to appear if it is not sending or receiving data properly.
6. Is it safe to continue driving with the OBDII code U0401 present?
- It is generally not recommended to continue driving with the U0401 code present, as it can lead to further damage to the vehicle and potentially affect safety.
7. Will resetting the trouble codes make the OBDII code U0401 go away?
- Resetting the trouble codes may temporarily clear the U0401 code, but if the underlying issue is not addressed, it is likely to reappear.
8. How can I prevent the OBDII code U0401 from reoccurring?
- Regular vehicle maintenance, ensuring all control modules are functioning properly, and addressing any communication issues promptly can help prevent the U0401 code from reoccurring.
9. Can a DIY enthusiast fix the OBDII code U0401 at home?
- Depending on the root cause of the U0401 code, some DIY enthusiasts may be able to address the issue at home by following diagnostic procedures and repair tips.
10. How much does it typically cost to repair the OBDII code U0401 at a mechanic or dealership?
- The cost of repairing the U0401 code can vary depending on the cause of the issue, but it may range from a couple of hundred to a few thousand dollars, including parts and labor.
Discuss the causes and fixes for U0401 OBDII Code
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Thanks, but what model? Repair información varies from model to model. I need the exact model and year to find the information in the service manual
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According to the factory service manual, the code means that it's receiving wrong data from the Engine Control Module (ECM) and that the ECM needs to be inspected to properly diagnose the problem.
Do you have any other codes starting with "P"?
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same problem U0401.chevrolet aveo 2013 transmission no reverse,there's a P code also P0463 fuel level sensor circuit low voltage & P0113 intake air temperature sensor circuit high voltage
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I have a 2014 Jeep Patriot 4 cylinder with the same problem. Won’t go when I give it gas
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Unfortunately there is no much information in the factory service manual. There are some tests that needs to be done with a factory scanner to determine if you have to replace the PCM. My only suggestion is to have the dealer check it for you.
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