U0401
High
Network
Invalid Data Received From ECM/PCM
Common Causes
PCM sending invalid data (may indicate PCM failure)
CAN bus noise or interference
PCM software fault
Common Symptoms
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Quick Info
| Code | U0401 |
| System | Network |
| Severity | High |
Disclaimer
This information is for diagnostic guidance only. Always verify repairs with a qualified technician before performing safety-critical work.
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