The B1246 code is a diagnostic trouble code (DTC) that often appears in vehicles with a Climate Control Unit. It signals a problem with the Rear Air Mix Control Motor, which is not operating correctly. This issue should be addressed promptly to prevent the Engine Light or Service Engine Soon Warning Light from illuminating.
Symptoms of the B1246 code may include inconsistent temperature control in the rear cabin, a lack of airflow from the rear vents, or the inability to adjust the rear air temperature.
The causes of the B1246 code can vary, but common culprits include a faulty air mix control motor, a malfunctioning climate control unit, or wiring issues.
To fix the B1246 code, a thorough diagnosis of the Climate Control Unit and Rear Air Mix Control Motor is necessary. This may involve inspecting and testing the motor, checking the climate control unit for any malfunctions, and examining the wiring for any damage or loose connections.
B1246 Code: Problem with the Rear Air Mix Control Motor
What does it mean
The B1246 code indicates a problem with the Rear Air Mix Control Motor in the Climate Control Unit. Possible causes include a faulty motor, wiring issues, or a faulty Climate Control Unit.
To diagnose this code, check for damaged components or wiring, as well as poor electrical connections. Pay attention to the wiring harness and connectors during the inspection. Overlooking electrical connections or not thoroughly inspecting the wiring harness are common mistakes when diagnosing this code.
What are the symptoms
The B1246 code has common symptoms that you should be aware of. These symptoms include the Engine Light or Service Engine Soon Warning Light being illuminated. This code indicates a problem with the Rear Air Mix Control Motor, which is monitored by the Climate Control Unit.
To make it easier for you to understand, here are three scenarios that may happen:
- The air conditioning system may not work properly, resulting in inconsistent airflow or a lack of cold air. The driver may notice this issue.
- The rear passengers might feel uncomfortable because the climate control system fails to regulate the temperature effectively.
- In some cases, the climate control system may stop responding completely, making it impossible to adjust the temperature or airflow.
What are the causes
The potential causes of the B1246 code include:
- Faulty rear air mix control motor
- Wiring or connection issues for the rear air mix control motor
- Faulty climate control unit
What Tools are Needed to diagnose
In order to diagnose the B1246 code effectively, a professional technician will need specific tools. The tools commonly used for diagnosing DTC B1246 include:
- Multimeter: This tool is essential for measuring voltage, resistance, and continuity in electrical circuits. It can be used to check the rear air mix control motor and its wiring for any faults or abnormalities.
- Scan tool: A scan tool is used to communicate with the vehicle’s onboard computer system and retrieve diagnostic trouble codes (DTCs). It allows the technician to access information about the climate control unit and monitor the rear air mix control motor’s operation.
- Other tools: Additional tools such as a wiring diagram, circuit tester, and inspection mirror may be required to perform a thorough diagnosis and identify any wiring or connection issues.
How to fix Step by Step
Step 1: Start by checking the possible causes mentioned earlier, such as a faulty Rear Air Mix Control Motor or a poor electrical connection in the Rear Air Mix Control Motor circuit.
Step 2: Visually inspect the wiring harness and connectors for any signs of damage. Look for broken, bent, pushed out, or corroded connector pins.
Step 3: Repair or replace any damaged components as necessary.
Step 4: It is important to note that the cost to diagnose the B1246 code may vary depending on factors such as labor rates and the make and model of the vehicle.
Step 5: By following these common solutions, you can effectively resolve the B1246 code and address any symptoms, such as the Engine Light being ON.
What are the Common Diagnosis Mistakes
When diagnosing DTC B1246, it is important to avoid common mistakes that can hinder the accurate identification and resolution of the issue. Here are some mistakes to keep in mind and steps to troubleshoot effectively:
- Misdiagnosing the Climate Control Unit: Before proceeding with further diagnosis, thoroughly inspect the Climate Control Unit to ensure it is functioning properly. Neglecting this step can lead to unnecessary repairs or overlooking the true cause of the DTC.
- Overlooking Wiring Harness and Connectors: It is crucial to visually inspect the wiring harness and connectors. Look for any damage, such as frayed wires or loose connections, as they can cause intermittent issues or complete failure of the Rear Air Mix Control Motor. Paying close attention to these components can prevent misdiagnosis.
- Skipping Basic Troubleshooting Steps: Technicians sometimes overlook basic troubleshooting steps, like checking for blown fuses or testing the voltage at various points in the circuit. These steps are essential in ruling out simple causes and narrowing down the true source of the problem.
What is the Repair Cost
The repair cost for resolving the B1246 code varies depending on factors such as location, vehicle make and model, and labor rates. Auto repair shops typically charge between $75 and $150 per hour for 1.0 hour of labor.
It is important to thoroughly check the wiring harness and connectors for faults and inspect the rear air mix control motor to avoid unnecessary expenses.
Can I drive safely with this code?
Driving with the B1246 code is not recommended as it can affect the performance of the climate control system due to a malfunction in the Rear Air Mix Control Motor.
This motor adjusts the temperature in the rear of the vehicle, and if it’s not working correctly, it can result in inadequate heating or cooling.
Promptly addressing this issue is crucial for optimal climate control system operation.
Wrapping Up: B1246 Code
The B1246 code indicates a problem with the Rear Air Mix Control Motor in vehicles equipped with a Climate Control Unit. This code can be triggered by various issues such as a faulty motor, wiring harness problems, or a malfunctioning Climate Control Unit.
It is important to diagnose and fix this issue promptly to ensure proper functioning of the vehicle’s climate control system. The cost of repairing this code can vary depending on factors such as the vehicle’s make and model.