U0106 • Network System

U0106: Network Communication Bus Fault U0106 — Meaning, Symptoms & Fixes

Detailed OBD2 fault code breakdown, severity assessment, repair advice, and shop cost range for code U0106.

What does fault code U0106 mean?

Diagnostic trouble code U0106 is defined as Network Communication Bus Fault U0106. This standard OBD2 code is triggered when your car's powertrain or module sensor voltage deviates from calibrated safety tolerances.

Severity & Can I Drive With Code U0106?

Severity Rating: 4/5 (High Severity)

⚠️ Drivability Warning: Prolonged driving with this code is not recommended. Prompt repair is suggested to prevent secondary component damage.

Common Symptoms of U0106

  • Multiple dashboard warning lights illuminated
  • Gauge cluster erratic

Common Causes Ranked by Likelihood

  • CAN High or CAN Low bus voltage drop
  • Unplugged module harness
  • Weak 12V battery

DIY Repair & Troubleshooting Steps

  • Check battery terminal voltage
  • Inspect CAN bus fuses

Professional Shop Repair & Estimated Cost Range

  • Trace CAN bus resistance with oscilloscope
  • Replace faulty bus module

Estimated Repair Cost Range: $120 - $800

Related Diagnostic Codes & Knowledge Base

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