Free API
U0183moderate severityNetwork

Lost Communication With Lighting Control Module Rear

on 2003 Infiniti FX45 4.5L V8 · AWD

What this code means

A control module lost communication with the rear lighting control module over the data bus. This can affect operation of rear exterior lights and related features.

Symptoms

  • Rear lights not working properly
  • Warning lamp illuminated
  • Fault code stored

Common causes

  • Faulty rear lighting control module
  • Wiring or connector fault
  • Blown fuse or power loss to module
  • Damaged data bus circuit

Diagnostic steps

  1. Scan for related U-codes on all modules
  2. Check power and ground at rear lighting module
  3. Inspect bus wiring and connectors for damage
  4. Test module communication with scan tool

Other Network codes on this vehicle

🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years. Spot an error? Use the Help link above — a human reads every report.
Stuck on this repair? Take it to The Diag Desk — ask a master tech about this exact car → real human answer within 24h, never AI
⚠ STILL BEHIND THE PAYWALL
The 2003 Infiniti FX45 repair data is incomplete because no one has sponsored it yet. For $99, we generate the full step-by-step procedures, then fact-check them with a second AI pass and your expert review. Your name on every procedure, permanently.
The same data would cost $169/mo from Mitchell1 or $30/year from ALLDATAdiy — and you'd be renting access, not freeing it. Sponsor once, free forever.
Sponsor the Infiniti FX45 — $99 →
Building an app?
Free API access to all this data — 10 requests/day, no card required.
Get an API key →
Run a shop?
Manage repairs, estimates, and customers with ShopBase — $249/mo, all features included.
Try ShopBase →