U0447: Invalid Data Received from Gateway A
Standardized SAE J2012 code · U04xx — Invalid data received
What does U0447 mean?
A subscriber module reports that the central gateway is forwarding implausible or malformed messages. Multiple modules can show seemingly unrelated faults until the gateway is repaired or reflashed.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
Symptoms
- Multiple warning lights may illuminate
- Affected modules may go into limp mode or shut down
- Specific functions inoperative depending on module
- Diagnostic tools may show communication faults
Common causes
- High Gateway software corrupted
- Medium Gateway internally failing
- Low Gateway module routing CAN messages incorrectly
Likelihood is a general estimate across vehicles; your make and model may differ.
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U0447 in the community
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