U0473 — Invalid Data Received From "Restraints System Sensor C"

U0473 — Invalid Data Received From "Restraints System Sensor C". A fault in the airbag / restraint system (SRS). Short, gentle driving to a shop is usually possible. Typical causes: damaged wiring under seats or in the steering column, SRS control module fault or stored crash data, faulty impact or occupancy sensor.

vehicle network

Is it safe to drive?

Drive with caution The car drives normally, but with the SRS light on the airbags may not deploy in a crash. Treat it as a safety-critical repair: fine to drive to the shop, not fine to ignore for months.

How to diagnose with an OBD scanner

  1. Read the code and freeze frame Connect an OBD2 scanner, confirm U0473 is stored, and save the freeze frame data — it shows engine conditions when the fault was detected.
  2. Check for companion codes and TSBs Related codes often reveal the real root cause. Also check manufacturer technical service bulletins (TSB) for your make and model — many U0xxx issues have factory fixes or software updates. Search by VIN on the manufacturer site or nhtsa.gov.
  3. Inspect wiring and connectors Visually inspect the wiring harness and connectors related to the airbag / restraint system (SRS) for damage, corrosion, chafing or poor contact.
  4. Subsystem check Read the SRS module with a scanner that supports airbag systems — generic OBD2 readers cannot see these codes.
  5. Subsystem check Inspect under-seat connectors — they are often disturbed by seat movement or cleaning.
  6. Verify the repair Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm U0473 does not return.

Approximate repair cost

Repair cost depends on which component actually failed. Typical scenarios for U0473 (parts and labor, USD, independent shop rates): SRS module reset or replacement: $300–$1,000; Reconnect or repair SRS wiring/connectors: $80–$250; Replace a sensor or clockspring: $150–$500. Overall, fixing U0473 usually costs between $80 and $1,000. An accurate diagnosis before buying parts saves money — the most expensive scenario is rarely the first one to check.

Common questions

What does OBD2 code U0473 mean?

U0473 — Invalid Data Received From "Restraints System Sensor C". A fault in the airbag / restraint system (SRS). Short, gentle driving to a shop is usually possible. Typical causes: damaged wiring under seats or in the steering column, SRS control module fault or stored crash data, faulty impact or occupancy sensor.

Is it safe to drive with U0473?

The car drives normally, but with the SRS light on the airbags may not deploy in a crash. Treat it as a safety-critical repair: fine to drive to the shop, not fine to ignore for months.

Will U0473 clear itself?

Sometimes U0473 clears after a few drive cycles if the fault was intermittent — for example a loose connector or a tank of bad fuel. The underlying cause usually remains, so the code tends to return. Clear it once; if it comes back, diagnose rather than erase it repeatedly.

What are the symptoms of U0473?

Drivers most often notice: airbag (SRS) warning light on, airbag system disabled message, no other driving symptoms.

How much does it cost to fix U0473?

SRS module reset or replacement — $300–$1,000; Reconnect or repair SRS wiring/connectors — $80–$250; Replace a sensor or clockspring — $150–$500. Exact cost depends on the root cause, your vehicle and local labor rates — a proper diagnosis is the cheapest first step.

What does U0473 mean?

The engine control module sets U0473 when it detects a fault in the airbag / restraint system (SRS). In practical terms: invalid data received from "restraints system sensor C". The code belongs to the vehicle network group of OBD2 codes.

To set U0473, the control module compares live readings of the airbag / restraint system (SRS) against calibrated limits, usually over several drive cycles. Alongside the code it stores a freeze frame — a snapshot of rpm, load, coolant temperature and vehicle speed at the moment of failure. Reading that snapshot first saves diagnostic time.

What causes U0473?

  • SRS control module fault or stored crash data
  • faulty impact or occupancy sensor
  • depleted backup battery or low system voltage
  • failed clockspring (driver airbag circuit)
  • damaged wiring under seats or in the steering column

Common symptoms of U0473

  • airbag (SRS) warning light on
  • airbag system disabled message
  • no other driving symptoms

How to diagnose U0473

  1. Connect an OBD2 scanner, confirm U0473 is stored, and save the freeze frame data — it shows engine conditions when the fault was detected.
  2. Related codes often reveal the real root cause. Also check manufacturer technical service bulletins (TSB) for your make and model — many U0xxx issues have factory fixes or software updates. Search by VIN on the manufacturer site or nhtsa.gov.
  3. Visually inspect the wiring harness and connectors related to the airbag / restraint system (SRS) for damage, corrosion, chafing or poor contact.
  4. Read the SRS module with a scanner that supports airbag systems — generic OBD2 readers cannot see these codes.
  5. Inspect under-seat connectors — they are often disturbed by seat movement or cleaning.
  6. Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm U0473 does not return.

How to fix U0473

Start with the cheapest and most common causes before replacing expensive parts:

  • SRS module reset or replacement — $300–$1,000
  • Reconnect or repair SRS wiring/connectors — $80–$250
  • Replace a sensor or clockspring — $150–$500

How much does it cost to fix U0473?

Repair cost depends on which component actually failed. Typical scenarios for U0473 (parts and labor, USD, independent shop rates):

  • SRS module reset or replacement: $300–$1,000
  • Reconnect or repair SRS wiring/connectors: $80–$250
  • Replace a sensor or clockspring: $150–$500

Overall, fixing U0473 usually costs between $80 and $1,000. An accurate diagnosis before buying parts saves money — the most expensive scenario is rarely the first one to check.

Can you drive with U0473?

The car drives normally, but with the SRS light on the airbags may not deploy in a crash. Treat it as a safety-critical repair: fine to drive to the shop, not fine to ignore for months.

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