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2005 LEXUS GS 430
4.3L V8•RWD•AUTOMATIC•gas
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Repairs0Labor479Torque3074Fluid8DTC1073Battery1Maintenance0Recalls0
U1056low severityNetwork

Loss of GPS Signal

on 2005 Lexus GS 430 4.3L V8 · RWD

What this code means

The navigation or telematics module has lost the GPS satellite signal for position data.

Symptoms

  • Navigation position lost
  • GPS coordinates unavailable
  • Map position incorrect or not updating
  • Telematics location unknown

Common causes

  • GPS antenna failure
  • GPS antenna cable damaged
  • Antenna connector loose
  • Windshield metallic coating blocking signal
  • Module GPS receiver failure

Diagnostic steps

  1. Check GPS antenna connection
  2. Test GPS antenna signal with known good antenna
  3. Inspect antenna cable routing
  4. Check for aftermarket window tint blocking GPS
  5. Test module GPS receiver

Repair notes

Check GPS antenna and cable connection. Metallic window tint can block GPS signal.

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🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Mechanic · 20+ years. Spot an error? Use the Help link above — a human reads every report.
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