U0400 — Invalid Data Received
Severity: Warning
Can you drive? With caution: limp mode possible, have it checked soon
Make: All makes (OBD-II standard)
| Meaning | Invalid Data Received. |
| Family | Network (U) |
Frequently asked questions
What does code U0400 mean?
Invalid Data Received. Invalid Data Received.
Can I keep driving with code U0400 active?
With caution: limp mode possible, have it checked soon
How do you fix code U0400?
Diagnosis starts from reading the live ECU parameters: the code points to the fault area, not to the part to replace. A vehicle-electronics specialist can test the component and clear the code after the repair.
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Where to get it fixed
Related codes
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- U0407 — Invalid Data Received From Glow Plug Control Module
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- U0409 — Invalid Data Received From Alternative Fuel Control Module
- U0410 — Invalid Data Received From Fuel Pump Control Module
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- U0412 — Invalid Data Received From Battery Energy Control Module A