OBD code B1861 indicates an issue with the Driver Side Knee Airbag Assembly in the airbag system.
Symptoms include the Air Bag Warning Light being illuminated.
This can be caused by a faulty airbag assembly, open or shorted harness, poor electrical connection, or a faulty Center Airbag Sensor Assembly.
It is a serious issue that requires immediate attention.
To fix it, inspect the wiring harness, connectors, and components for any damage or poor connections.
| Repair Importance Level | 10.0 (Out of 10) |
| Estimated Repair Time | Approximately 1.0 hour |
| Repair Difficulty Level | 10.0 (Out of 10) |
Symptoms of the b1861 OBD Code
The vehicle’s airbag warning light is illuminated on the dashboard.
- Symptoms: Air Bag Warning Light ON
Causes of the b1861 OBD Code
Do you know you can clear most fault codes—but some could mean serious danger? Don’t take chances with your safety or your family’s safety. This budget-friendly car scanner makes it easy to clear fault codes in seconds while showing you exactly what’s wrong. Plug it in, connect to your Android or iOS phone, and instantly check live data. You’ll know if it’s a minor issue you can clear or something serious that needs attention—so you can drive safely and stress-free. (Today’s Deal)
B1861 code typically indicates a fault in the driver’s airbag squib circuit.
- B1861 can be caused by a faulty Driver Side Knee Airbag Assembly (Driver Side Knee Squib).
- A broken Driver Side Knee Airbag Assembly harness.
- An open or shorted Driver Side Knee Airbag Assembly circuit.
- A poor electrical connection in the Driver Side Knee Airbag Assembly circuit.
- Or a faulty Center Airbag Sensor Assembly.
Fixing Error Code b1861 Step By Step
Repair the wiring harness between the airbag control module and the driver’s airbag inflator.
- To fix OBDII code B1861, first, review the possible causes related to this code.
- Visually examine the wiring harness and connectors associated with the airbag system.
- Check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.
- If no visible issues are found, perform a diagnostic scan tool test to pinpoint the exact cause of the code.
- Depending on the findings, you may need to replace the faulty airbag module, repair damaged wiring, or reset the module using a compatible scan tool.
Cost Of Fixing b1861 Fault Code
Repairing fault code B1861 typically involves replacing the driver’s airbag squib circuit open.
The cost to diagnose and fix OBD code B1861 depends on the estimated 1. 0hour repair time.
Labor rates usually range from $75 to $150 per hour, so the total cost could be between $75 and $150. Factors like shop rates and complexity can affect the final cost.
That fault code is a turning point. If repair costs are climbing and your current loan feels like it’s holding you back, this is the time to plan ahead. The free Car Loan Payment Tracker helps you see how quickly you can pay off what’s left—and start preparing, with confidence, for your dream car.
Details of the b1861 OBD Code
B1861 code indicates a problem with the airbag system’s impact sensor.
OBD code B1861 means Air Mix Damper Position Sensor Circuit Short to Ground.
This code is triggered by the HVAC (Heating, Ventilation, and Air Conditioning) system control module when it detects a short to ground in the circuit related to the air mix damper position sensor.
The air mix damper position sensor is responsible for regulating the blend of hot and cold air in the HVAC system to maintain the desired cabin temperature.
When a short to ground is detected in the sensor circuit, the control module sets code B1861 to indicate the issue with the sensor’s signal.
Mechanic’s Tech Notes
Code B1861 relates to the airbag system’s impact sensor circuit malfunction, typically caused by wiring issues or sensor failure.
OBDII code B1861 indicates a fault with the airbag system’s internal diagnostic monitor.
To diagnose, use a scan tool to retrieve freeze frame data and clear the code.
Check the wiring harness and connectors for damage, corrosion, or poor connections.
Inspect the airbag control module for any signs of physical damage.
Test the power and ground circuits to the airbag module using a voltmeter.
Ensure the module is receiving proper voltage and ground.
If all checks out, consider reprogramming or replacing the airbag control module.
FAQ
OBD code B1861 indicates an issue with the Driver Side Knee Airbag Assembly. Check for wiring harness faults and inspect connectors for damage or corrosion.
Common symptoms of OBD code B1861 include Air Bag Warning Light ON. Causes may be a faulty Driver Side Knee Airbag Assembly or related wiring issues. Fix: Inspect and repair affected components.
To diagnose and repair OBD code B1861 (Driver Side Knee Airbag Assembly Squib Circuit Open), visually inspect wiring harness, connectors, and components for damage or poor connections.
Wrap Up
If your airbag warning light is on and you see OBDII code b1861, it may indicate a fault in the left side impact sensor circuit.
This could be caused by a damaged sensor, faulty wiring, or poor connections in the system.
To address OBDII code b1861, check the wiring and connectors leading to the left side impact sensor.
Look for any signs of damage, corrosion, or loose connections.
Test the sensor itself for proper operation and replace if necessary to resolve the issue.
