Free API

U0226

NetworkModule Communicationmoderate severity

Lost Communication With Zone Module G

What U0226 Means

The main controller can't talk to Zone Module G over the data bus. Devices controlled by that module may stop responding.

Symptoms

  • Dash warning lights
  • Zone features inoperative
  • Intermittent glitches

Common Causes

  • Faulty Zone Module G
  • Wiring or connector fault at module
  • Blown fuse or lost power/ground
  • Damaged CAN bus wiring

Diagnostic Steps

  1. Scan all modules for stored codes
  2. Check power and ground at Zone Module G
  3. Test CAN bus wiring for continuity
  4. Replace module if unresponsive

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Wiring Data
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