U0101 High Network

Lost Communication With TCM

Common Causes

Failed TCM
CAN bus fault to TCM
TCM power or ground fault
Corroded TCM connector

Common Symptoms

Multiple Warning Lights On Communication / Network Fault

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Quick Info

Code U0101
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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