What Does B1944 Mean?
This code indicates the airbag control module has detected an open circuit in the ground path for crash sensor #1. The airbag control module continuously monitors all crash sensor circuits for proper voltage and resistance values. When the ground circuit for the primary impact sensor shows infinite resistance or no continuity, the system sets this code and typically illuminates the airbag warning light, potentially disabling the supplemental restraint system.
Safety Warning
The vehicle is not safe to drive as the airbag system may be disabled or malfunctioning, meaning airbags may not deploy in a collision. This repair should be addressed immediately before operating the vehicle, as occupant protection is severely compromised.
Common Causes
45%
Corroded, damaged, or disconnected ground wire or terminal at crash sensor #1 connector
30%
Failed or internally damaged crash sensor #1 with open ground circuit
15%
Damaged wiring harness between crash sensor and airbag control module with broken ground wire
10%
Poor chassis ground connection or corroded ground point where sensor ground terminates
Diagnostic Steps
1
Step 1: Perform visual inspection of crash sensor #1 location (typically front bumper reinforcement or radiator support) for physical damage, connector damage, corrosion, or disconnected harness. Check connector terminals for pushed-back pins, corrosion, or moisture intrusion.
2
Step 2: Using a digital multimeter, disconnect crash sensor #1 connector and measure resistance from sensor ground pin to chassis ground (should read less than 1 ohm). Then measure resistance from the harness-side ground pin back to a known good chassis ground to verify ground circuit continuity.
3
Step 3: If ground circuit tests good, measure resistance across crash sensor terminals per manufacturer specifications (typically 2-10 ohms depending on sensor type). Compare readings to known good values to determine if sensor is internally failed.
4
Step 4: Inspect airbag harness routing from sensor to control module for pinch points, chafing against sharp metal edges, or damage from previous collision repairs. Pay special attention to areas near body seams and behind bumper covers.
5
Step 5: Clear codes after repairs are completed, perform airbag system self-test, and road test vehicle to verify code does not return. Ensure airbag warning light operates properly during ignition cycle and extinguishes after system check.
Estimated Repair Cost
$150 - $650
Parts + labor, varies by vehicle and location
This code indicates the airbag control module has detected an open circuit in the ground path for crash sensor #1. The airbag control module continuously monitors all crash sensor circuits for proper voltage and resistance values. When the ground circuit for the primary impact sensor shows infinite ...
The most common cause of B1944 (Air Bag Crash Sensor #1 Ground Circuit Open) is: Corroded, damaged, or disconnected ground wire or terminal at crash sensor #1 connector
Typical repair costs for B1944 range from $150 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 airbag system may be disabled or malfunctioning, meaning airbags may not deploy in a collision. This repair should be addressed immediately before operating the vehicle, as occupant protection is severely compromised.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B1944 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 (Airbag System)
Difficulty
Type
Manufacturer
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
