U0400
Invalid Data Received
U0400 is an OBD-II diagnostic trouble code meaning: Invalid Data Received. Common causes: malfunction of the data sending module, damage to can bus wiring. Estimated repair cost: ~$167.
Symptoms
- Check Engine light comes on
- Unstable engine operation
- Power Loss
- Incorrect operation of other vehicle systems
- Errors in other modules
Causes
- Malfunction of the data sending module
- Damage to CAN bus wiring
- Poor contact in connectors
- Problems with module power supply
- Software errors in modules
How to Fix
- Check error codes in other modules
- Inspect the CAN bus wiring and connectors
- Check power and ground of modules
- Test the data sending module
- Update module software
Related codes
Error U0400 by Vehicle Brand
FAQ
What does the U0400 code mean?
U0400 is an OBD-II diagnostic trouble code that indicates: Invalid Data Received
What causes a U0400 error code?
The most common causes of U0400 include: Malfunction of the data sending module; Damage to CAN bus wiring; Poor contact in connectors; Problems with module power supply.
How do I fix a U0400 diagnostic trouble code?
To fix U0400: Check error codes in other modules. Inspect the CAN bus wiring and connectors. Check power and ground of modules. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U0400?
Yes, but get it checked soon
How much does it cost to fix U0400?
The estimated repair cost for U0400 is ~$167. Actual cost depends on your vehicle, location, and labor rates.
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