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U0473 — Invalid Data Received From Restraints System Sensor C

Generic OBD-II · all makesNetwork / communication

This code indicates that a control module has received implausible or invalid data from a specific restraint system sensor, labeled as Sensor C. It points to a communication fault within the Supplemental Restraint System (SRS) network rather than an engine performance issue. The vehicle may not deploy airbags correctly if this fault remains active.

Symptoms

What causes it — most likely first

1. Faulty restraint system sensor C

The specific impact or satellite sensor identified as Sensor C may be internally failed or sending erratic signals.

2. Damaged wiring or connectors

Harness damage, chafing, or loose connections in the SRS circuit can corrupt data transmission.

3. Corrosion at sensor plug

Moisture intrusion or oxidation at the sensor connector can cause high resistance or signal interference.

4. Failed SRS control module

The airbag control unit itself may have internal processing faults preventing correct data interpretation.

5. Network communication bus fault

Issues with the CAN bus or proprietary SRS network wiring can lead to data validity errors.

6. Failed PCM or ECM

Extremely rare; the powertrain computer is rarely involved in SRS sensor data validation unless acting as a network gateway.

How it's diagnosed

  1. Scan all modules for SRS and network-related codes
  2. Visually inspect wiring harnesses connected to restraint sensor C
  3. Check connector pins for corrosion, damage, or looseness
  4. Measure resistance and voltage at the sensor connector per service manual
  5. Swap sensor C with a known good unit if accessible and safe
  6. Check network communication lines for shorts or opens

Code facts & related codes

SystemNetwork / communication
StandardizationSAE generic — identical on every make

Frequently asked

Will this code affect engine driving performance?

No, this code relates to the safety airbag system and does not control engine operation.

Do I need to replace the main engine computer (PCM) for this code?

No, replacing the PCM is rarely the fix for SRS communication codes; focus on the sensor and wiring first.

Is it safe to drive with this code?

The vehicle will drive normally, but the airbag system may not deploy in a collision, posing a safety risk.

Can I reset this code with a basic scanner?

Usually no, SRS codes often require a specialized scan tool to clear after repairs.