What Does B2445 Mean?
B2445 indicates that the Restraint Control Module (RCM) or Airbag Control Module has detected an internal electrical or circuit malfunction within the passenger side impact or crash sensor. This sensor is designed to detect side-impact collisions and trigger appropriate airbag deployment. The fault is internal to the sensor itself, not in the wiring or connections, suggesting the sensor's accelerometer or internal circuitry has failed or is providing invalid data.
Safety Warning
The vehicle is not safe to drive as the passenger side airbags may not deploy properly in a side-impact collision, putting occupants at severe risk. The airbag warning light will remain illuminated and the entire SRS system may be disabled until the fault is repaired. Immediate professional repair is required.
Common Causes
55%
Failed passenger side impact crash sensor with internal component failure or accelerometer malfunction
25%
Water intrusion or corrosion inside the crash sensor housing causing internal circuit damage
15%
Previous impact or collision damage that damaged the sensor internally without external visible damage
5%
Restraint Control Module fault misidentifying or misdiagnosing sensor condition
Diagnostic Steps
1
Step 1: Visually inspect the passenger side impact sensor location (typically in B-pillar or door structure) for physical damage, water intrusion, collision damage, or mounting issues. Check sensor mounting bracket for proper installation and integrity.
2
Step 2: Using a multimeter, verify power supply voltage (typically 5V reference) and ground at the crash sensor connector. Measure resistance between sensor pins according to manufacturer specifications (typically 1-5k ohms at rest).
3
Step 3: Inspect the sensor wiring harness and connector for corrosion, bent pins, water intrusion, or damage. Perform wiggle test on harness while monitoring live data for intermittent faults.
4
Step 4: Access live data or sensor output values through the diagnostic tool to verify if the sensor is sending valid data or is reading out-of-range values (stuck high/low acceleration values).
5
Step 5: Replace the passenger side crash sensor with OEM or equivalent part, ensuring proper torque specifications and sensor orientation. Clear codes and perform airbag system verification procedure.
6
Step 6: Perform post-repair verification by cycling ignition, confirming no airbag warning light, and verifying all crash sensors show normal readings with no stored or pending codes.
Estimated Repair Cost
$250 - $650
Parts + labor, varies by vehicle and location
B2445 indicates that the Restraint Control Module (RCM) or Airbag Control Module has detected an internal electrical or circuit malfunction within the passenger side impact or crash sensor. This sensor is designed to detect side-impact collisions and trigger appropriate airbag deployment. The fault ...
The most common cause of B2445 (Passenger Side Crash Sensor Internal Fault) is: Failed passenger side impact crash sensor with internal component failure or accelerometer malfunction
Typical repair costs for B2445 range from $250 to $650, depending on the vehicle, location, and whether you do it yourself or go to a shop.
The vehicle is not safe to drive as the passenger side airbags may not deploy properly in a side-impact collision, putting occupants at severe risk. The airbag warning light will remain illuminated and the entire SRS system may be disabled until the fault is repaired. Immediate professional repair is required.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B2445 to identify the root cause.
OBDHut Mobile App
Scan codes directly from your car with the OBDHut app.
Coming Soon
Quick Info
Category
Body
System
Supplemental Restraint System (SRS/Airbag)
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
