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U0179: Lost Communication With Restraints System Sensor J

Severity
Medium
System
Network Communication
Last reviewed: Last updated:

Methodology: We combine code standards with complaint and reliability patterns, then review for clear, vehicle-first diagnosis steps.

Sources: SAE/OBD-II definitions, manufacturer service information, and public reliability reports (including NHTSA where applicable).

Limits: Guidance is informational and may not match every model-year or revision. Confirm with the official manual and diagnostics before replacing parts. For safety-critical or electrical work, use a qualified technician.

What Does U0179 Mean?

U0179 is a diagnostic trouble code indicating: Lost Communication With Restraints System Sensor J. This code relates to the network communication system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

Symptoms of U0179

Common Causes

Frequently Asked Questions

What does U0179 mean?
U0179 indicates: Lost Communication With Restraints System Sensor J. The vehicle's computer has detected that the Restraints System Sensor J is not operating within its expected parameters and stored this diagnostic trouble code.
Can I drive with code U0179?
You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with U0179 for extended periods may cause additional problems.
How much does it cost to fix U0179?
Repair costs for U0179 typically range from $80 to $1200, depending on the root cause. Simple wiring or connector repairs are on the lower end, while component replacement costs more. A proper diagnosis ($80–$150 at most shops) will identify the exact cause before committing to expensive parts.

What To Do Next

Possible Fixes

  • 🔧 Inspect CAN bus wiring to Restraints System Sensor J for damage
  • 🔧 Check power and ground supply to Restraints System Sensor J
  • 🔧 Replace failed Restraints System Sensor J
  1. 1
    Find your vehicle above

    Click your make and model for real owner reports and common causes specific to your vehicle.

  2. 2
    Check for recalls

    Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.

  3. 3
    Get a professional diagnosis

    A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.

Related Codes

U0100 Lost Communication With ECM/PCM A U0101 Lost Communication With TCM U0102 Lost Communication With Transfer Case Control Module U0103 Lost Communication With Gear Shift Control Module A U0104 Lost Communication With Cruise Control Module U0105 Lost Communication With Fuel Injector Control Module U0106 Lost Communication With Glow Plug Control Module 1 U0107 Lost Communication With Throttle Actuator A Control Module U0108 Lost Communication With Alternative Fuel Control Module U0109 Lost Communication With Fuel Pump Control Module A