01 Mechanics Admit They're Surprised How Many Owners Don't Kno… • 02 Extend Your Car's Lifespan to 300000 Miles with These Power… • 03 Car Rattling and Shaking while Idling: Causes and Fixes • 04 People Admit They Ignored This Strange Noise Until Their En… • 05 Can You Jump-Start Any Large Truck with a Car? Yes, and Her… • 06 Decoding the Check Engine Light: Causes, Troubleshooting, a… • 07 The Latest Advances in 3D Printing: How This Technology is … • 08 Is it Bad to Pump Your Brakes When The Car is Off? • 09 How EVs are Reshaping Auto Repairs and Opening Doors for Me… • 10 Troubleshooting Turn Signal Woes: Why Do Turn Signals Blink… •

DTC codes / U04xx · Invalid data received from a module / U0472

U0472Invalid Data Received From Restraints System Sensor B

U0472 is a communication fault where the restraints control module (RCM) or airbag control module reports that it has received invalid or corrupted data from a specific restraints system sensor, designated Sensor B. The computer detected a message from that sensor that failed its internal plausibility or checksum validation, so the module cannot trust the sensor's readings and sets this code.

SystemNetwork
Code typeGeneric (all makes)
SeverityMedium
Fix difficultyIntermediate
AreaInvalid data received from a module

Symptoms you may notice

  • The airbag or supplemental restraint system (SRS) warning light stays illuminated on the dashboard.
  • A chime or message may appear indicating a restraint system fault or service airbag soon.
  • The passenger airbag may be automatically disabled or the seatbelt pretensioner may not deploy in a collision.
  • Often no symptoms besides the warning light, with the vehicle driving normally.
  • In some vehicles, remote start or other convenience features may be inhibited while the fault is active.
  • Intermittent warning light operation if the invalid data occurs only under certain conditions such as vibration or temperature extremes.

Common causes, most likely first

  1. A faulty restraints system sensor B, such as a side impact sensor or seat position sensor, sending corrupted or out-of-range data.
  2. Damaged or corroded wiring or connector pins between sensor B and the restraints control module.
  3. Water intrusion or physical damage to the sensor or its connector causing intermittent invalid signals.
  4. A failing restraints control module that misinterprets valid sensor data as invalid.
  5. Low battery voltage or charging system problems causing the sensor to output erratic data.
  6. Aftermarket accessories or improper previous repairs introducing electrical interference on the sensor circuit.
  7. A software or calibration issue in the restraints control module requiring a reprogramming update.

How to diagnose and fix it

  1. Verify battery voltage and charging system performance, as low voltage can cause invalid sensor data.
  2. Scan all modules for related codes and record freeze-frame data to identify when the invalid data occurs.
  3. Visually inspect sensor B and its wiring harness for damage, corrosion, water intrusion, or loose connectors.
  4. Perform a wiggle test on the sensor harness while monitoring live data to catch intermittent faults.
  5. Check service information for any technical service bulletins or calibration updates related to this code.
  6. If the sensor circuit checks out, substitute a known-good sensor B and clear the code to see if it returns.
  7. As a last step, diagnose or replace the restraints control module only after ruling out sensor and wiring faults.

What the code does not always mean

  • U0472 often points to a wiring or connector problem rather than a failed sensor, so replacing the sensor first can be a costly misdiagnosis.
  • A weak battery or poor ground connection can cause the restraints module to receive invalid data from a perfectly good sensor.
  • Some vehicles require the restraints control module to be reprogrammed after sensor replacement, and skipping this step can leave the code stored.
  • The code can be set intermittently by vibration or temperature changes, so a static test may pass while the fault remains.
  • Aftermarket electronic accessories wired near the restraints system can introduce interference that corrupts sensor data.

Can I keep driving with U0472?

You can usually drive the vehicle, but the airbag system may be partially disabled, so avoid aggressive driving and have the fault diagnosed promptly. Do not ignore the warning light, because restraint system performance in a collision could be compromised.

Tools that help

Tools we recommend are in the Auto Veteran shop on Amazon. As an Amazon Associate we earn from qualifying purchases.

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.

Running on fumes Free guides aren't free to make. Top up the tank. Any amount, one time. Fuel the Garage