U0401
Invalid Data Received From ECM/PCM A
U0401 is an OBD-II diagnostic trouble code meaning: Invalid Data Received From ECM/PCM A. Common causes: problems with wiring between modules, ecm/pcm malfunction. Estimated repair cost: $56–278.
Symptoms
- Check Engine light comes on
- Incorrect operation of the automatic transmission
- Disabling stabilization systems
- Reduced engine power
- Errors in other vehicle systems
Causes
- Problems with wiring between modules
- ECM/PCM malfunction
- Poor contact in connectors
- ECM/PCM power supply problems
- Software error in ECM/PCM
How to Fix
- Check the integrity of the wiring between the modules
- Inspect the ECM/PCM connectors for oxidation or damage.
- Check ECM/PCM power supply and grounding
- Read all error codes and perform a full diagnostic
- If necessary, reflash or replace the ECM/PCM
Related codes
Error U0401 by Vehicle Brand
FAQ
What does the U0401 code mean?
U0401 is an OBD-II diagnostic trouble code that indicates: Invalid Data Received From ECM/PCM A
What causes a U0401 error code?
The most common causes of U0401 include: Problems with wiring between modules; ECM/PCM malfunction; Poor contact in connectors; ECM/PCM power supply problems.
How do I fix a U0401 diagnostic trouble code?
To fix U0401: Check the integrity of the wiring between the modules. Inspect the ECM/PCM connectors for oxidation or damage.. Check ECM/PCM power supply and grounding. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U0401?
Yes, but get it checked soon
How much does it cost to fix U0401?
The estimated repair cost for U0401 is $56–278. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat