Code
U0476
Generic
U — Network/User
Invalid Data Received From Restraints System Sensor F
AI status
Completed
Completed
100%
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
- Safety first: follow SRS safety procedures — disable battery and wait manufacturer-specified time before servicing restraint circuits.
- Use a diagnostic scan tool to read all codes and freeze frame data; note any additional U- or B-codes.
- Clear codes, then re-run to see if U0476 returns and capture when/under what conditions it sets.
- Inspect the sensor connector and wiring for damage, corrosion, or poor repair work; repair as needed.
- With ignition ON (and SRS safety observed), backprobe sensor connector: verify sensor reference voltage, signal voltage, and ground continuity against expected values.
- Monitor live data for the restraints sensor message on the network; confirm message ID, frequency, and that the payload value changes plausibly.
- Wiggle harness and connectors while watching live data and codes to find intermittent faults.
- Check CAN/LIN bus integrity: measure bus voltages, termination, and look for error frames with a scope or qualified scan tool.
- If wiring and connectors are good, replace the sensor (if serviceable) and recheck.
- 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.
- 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
Repair manuals
Brands with available manuals
9,392
The library contains 9,392 repair and diagnostic manuals. Choose a brand to open the full manual tree by year, model and trim.
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email
Code
U0476
HYUNDAI
U — Network/User
Invalid Data Received From “Restraints System Sensor F”
AI status
Completed
Completed
100%
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
- Safety first: follow SRS safety procedures — disable battery and wait manufacturer-specified time before servicing restraint circuits.
- Use a diagnostic scan tool to read all codes and freeze frame data; note any additional U- or B-codes.
- Clear codes, then re-run to see if U0476 returns and capture when/under what conditions it sets.
- Inspect the sensor connector and wiring for damage, corrosion, or poor repair work; repair as needed.
- With ignition ON (and SRS safety observed), backprobe sensor connector: verify sensor reference voltage, signal voltage, and ground continuity against expected values.
- Monitor live data for the restraints sensor message on the network; confirm message ID, frequency, and that the payload value changes plausibly.
- Wiggle harness and connectors while watching live data and codes to find intermittent faults.
- Check CAN/LIN bus integrity: measure bus voltages, termination, and look for error frames with a scope or qualified scan tool.
- If wiring and connectors are good, replace the sensor (if serviceable) and recheck.
- 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.
- 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
Repair manuals
Manual library for HYUNDAI
371
Browse 371 HYUNDAI manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.
HYUNDAI
-
HYUNDAI: 2023
-
Elantra
-
Elantra N
-
Kona N
-
Tucson
- Hybrid Blue
- Hybrid Limited
- Hybrid SEL Convenience
- Limited, Eng CD G4EN, 4WD
- Limited, Eng CD G4EN, FWD
- Limited, Eng CD G4KN, 4WD
- Limited, Eng CD G4KN, FWD
- N Line, Eng CD G4EN, 4WD
- N Line, Eng CD G4EN, FWD
- N Line, Eng CD G4KN, 4WD
- N Line, Eng CD G4KN, FWD
- Plug-In Hybrid Limited
- Plug-In Hybrid SEL
- SE, Eng CD G4EN, 4WD
- SE, Eng CD G4EN, FWD
- SE, Eng CD G4KN, 4WD
- SE, Eng CD G4KN, FWD
- SEL, Eng CD G4EN, 4WD
- SEL, Eng CD G4EN, FWD
- SEL, Eng CD G4KN, 4WD
- SEL, Eng CD G4KN, FWD
- XRT, Eng CD G4EN, 4WD
- XRT, Eng CD G4EN, FWD
- XRT, Eng CD G4KN, 4WD
- XRT, Eng CD G4KN, FWD
-
-
HYUNDAI: 2022
-
Elantra N
-
Kona N
-
Veloster N
-
HYUNDAI: 2021
-
Veloster N
-
HYUNDAI: 2020
-
Palisade
-
Veloster N
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email