OBD code B113C indicates a fault with the Rear Audio Switch in the Rear Audio and Temperature Control (RATC) Module.
Symptoms include the Engine Light being ON.
The issue is commonly caused by a faulty Rear Audio Switch or related wiring problems.
While not a critical problem, it should be addressed promptly.
To fix it, inspect the wiring harness and connectors 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 b113c OBD Code
The vehicle displays an airbag warning light on the dashboard.
- Symptoms: Service Engine Soon Warning Light ON.
- Possible loss of communication with the body control module.
- Intermittent issues with power windows or locks.
- Difficulty starting the vehicle at times.
Causes of the b113c OBD Code
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Possible triggers for fault code B113C include issues with the HVAC control module or wiring faults.
- B113C can be caused by a Faulty Rear Audio Switch.
- A Rear Audio Switch harness that is open or shorted.
- A Rear Audio Switch circuit with poor electrical connection.
- A Faulty Rear Audio and Temperature Control (RATC) Module.
Fixing Error Code b113c Step By Step
To resolve fault code B113C, inspect and repair the driver’s side airbag module circuit as needed.
- To fix OBDII code B113C, start by reviewing the possible causes mentioned above and visually examining the corresponding wiring harness and connectors.
- 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, proceed to test the circuit for continuity and resistance.
- Next, check the operation of the sensor or module associated with the code.
- Replace the sensor or module if necessary.
- Finally, clear the fault codes and perform a road test to ensure the issue has been resolved.
Cost Of Fixing b113c Fault Code
Diagnosing and repairing fault code B113C may involve inspecting and replacing the HVAC control module.
The cost to diagnose and fix OBD code B113C 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 of the repair can influence the final cost.
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Details of the b113c OBD Code
Fault code B113C relates to a fault in the airbag module.
OBD code B113C means Sunload Sensor 1 Circuit Short to Battery.
This code is triggered by the Body Control Module (BCM) when it detects a short to battery in the circuit of the sunload sensor 1. The sunload sensor measures the intensity of sunlight entering the vehicle and helps the HVAC system adjust the temperature and airflow accordingly.
Mechanic’s Tech Notes
Code B113C indicates a fault in the driver’s side airbag module.
OBDII code B113C typically indicates a fault with the transmission control module (TCM) power supply.
To diagnose, use a voltmeter to check TCM power and ground connections for proper voltage levels.
Utilize a scan tool to confirm TCM communication over the Controller Area Network (CAN) network.
If the TCM is unresponsive, reprogramming or reflashing may be necessary.
Visually inspect wiring harnesses and connectors for any damage, and ensure connector pins are not broken, bent, pushed out, or corroded.
This thorough inspection can help pinpoint the root cause of the issue and guide you towards an effective repair.
FAQ
OBD code B113C indicates an issue with the Rear Audio Switch circuit. Check for faults in the switch, wiring, or RATC module. Inspect and repair as needed.
Common symptoms of OBD code B113C include Engine Light ON. Possible causes are a faulty Rear Audio Switch or RATC Module. Inspect wiring and connectors for issues.
Diagnose OBD code B113C by checking for a faulty Rear Audio Switch, open/shorted harness, or poor connection. Inspect wiring and connectors for damage or corrosion.

Wrap Up
If your vehicle is displaying OBD code b113c, you may experience issues with the airbag system, such as the airbag warning light staying on or the airbags not deploying in a collision.
This code typically indicates a problem with the passenger airbag deactivation indicator circuit.
To address OBD code b113c, start by inspecting the wiring and connectors related to the passenger airbag deactivation indicator.
Look for any damaged wiring, loose connections, or faulty components in the circuit.
Replace any defective parts as needed to resolve the issue.