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Home / DTC / U0476 — Invalid Data Received From Restraints System Sensor F

U0476 — Invalid Data Received From Restraints System Sensor F

Detailed page for trouble code U0476.

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Code

U0476

Generic U — Network/User

Invalid Data Received From Restraints System Sensor F

Brand: Generic
Type: U — Network/User
Views: UK: 17 EN: 22 RU: 15
AI status
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Page language: EN

Causes

  • Failed Restraints System Sensor F (internal fault)
  • Corroded, loose or damaged connector at the sensor
  • Broken, shorted or intermittent wiring between sensor and restraints control module
  • Loss of sensor reference voltage or ground (open/low supply)
  • CAN/LIN bus errors or network interference affecting message integrity
  • Faulty restraints control module (RCM/SRS module) or other module misinterpreting data

Symptoms

  • Airbag / SRS warning lamp illuminated
  • Related restraints features disabled or put in a fault-safe state (e.g., belt pretensioners)
  • Stored U0476 and possibly other network/communication DTCs
  • Chimes or occupant classification faults (if applicable)
  • Inconsistent or missing live data for Restraints Sensor F on a scan tool

What to check

  • Read and record all stored codes and freeze frame data with a capable scan tool
  • Check for related network codes (other U-codes) and multiple module faults
  • Inspect physical connector at Restraints Sensor F for corrosion, bent pins, or poor mating
  • Visually inspect wiring harness from sensor to restraints control module for damage, pinches, or repairs
  • Backprobe the sensor connector and monitor reference voltage, signal, and ground with ignition on
  • Monitor live data stream for sensor values, message rates and communication dropouts

Signal parameters

  • CAN message ID and payload vary by vehicle; expected periodic message from Restraints module (example: 0x7xx) containing sensor data
  • Typical message period: 5–20 Hz (manufacturer-specific)
  • DLC (data length): commonly 8 bytes; sensor value often 1 byte (0–255) or 2 bytes
  • Expected sensor value range: manufacturer-defined (often 0 = open/invalid, valid operational range non-zero)
  • Reference/supply: typically 5 V or vehicle battery switched supply; measure expected voltage vs. ground
  • Ground continuity: low resistance to chassis ground; intermittent/ high resistance causes corrupted data

Diagnostic algorithm

  1. Safety first: follow SRS safety procedures — disable battery and wait manufacturer-specified time before servicing restraint circuits.
  2. Use a diagnostic scan tool to read all codes and freeze frame data; note any additional U- or B-codes.
  3. Clear codes, then re-run to see if U0476 returns and capture when/under what conditions it sets.
  4. Inspect the sensor connector and wiring for damage, corrosion, or poor repair work; repair as needed.
  5. With ignition ON (and SRS safety observed), backprobe sensor connector: verify sensor reference voltage, signal voltage, and ground continuity against expected values.
  6. Monitor live data for the restraints sensor message on the network; confirm message ID, frequency, and that the payload value changes plausibly.
  7. Wiggle harness and connectors while watching live data and codes to find intermittent faults.
  8. Check CAN/LIN bus integrity: measure bus voltages, termination, and look for error frames with a scope or qualified scan tool.
  9. If wiring and connectors are good, replace the sensor (if serviceable) and recheck.
  10. If replacement sensor does not clear the fault, consider module fault: verify grounds and power to restraints control module and reflash or replace module only after confirming wiring/sensor are good.
  11. After repairs, clear codes and perform a road or system test to ensure the code does not return and restraints system operates normally.

Likely causes

  • Connector contamination/corrosion at the sensor or module
  • Open/short in sensor signal or supply wires (most common)
  • Failed sensor element inside Restraints System Sensor F
  • Intermittent communication on CAN/LIN bus due to grounding or shielding issue

Fault status

⚠️ Status
Invalid data/communication received from Restraints System Sensor F — possible sensor failure, wiring/connector fault, or bus communication error.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

U0475 U0474 U0121 U0155 U0100
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