The B1245 code refers to a problem with the Rear Air Mix Control Motor in the Climate Control Unit. Symptoms of this issue may include inconsistent heating or cooling in the rear of the vehicle, or the air mix control not responding properly.
The causes of this code can vary, including a malfunctioning motor, wiring problems, or faulty electrical connections.
To fix this problem, it is important to visually inspect the wiring harness and connectors for any damage and make any necessary repairs or replacements.
Seeking assistance from a professional is recommended to ensure an accurate diagnosis and estimate.
B1245: Problem with the Rear Air Mix Control Motor in the Climate Control Unit
What does it mean
The B1245 code indicates a failure in the Rear Air Mix Control Motor. If not addressed, it can lead to reduced heating/cooling performance and discomfort for passengers. Resetting the code won’t fix the issue; professional diagnosis and repairs are necessary.
What are the symptoms
The symptoms of the B1245 code can be identified by the Engine Light or Service Engine Soon Warning Light turning on. Depending on the specific vehicle, there may be additional symptoms.
It is important to note the following about the symptoms:
- Lack of temperature control: The rear air mix control motor may not properly adjust the temperature in the vehicle’s rear air system. This can result in inconsistent or uncomfortable climate conditions.
- Poor air distribution: The motor may struggle to regulate the distribution of air to the rear vents, causing weak airflow or uneven cooling/heating.
- Unresponsive controls: The climate control unit may become unresponsive or fail to accurately respond to adjustments made by the driver. This can make it difficult to effectively control the rear air system.
- Erratic fan behavior: The malfunctioning rear air mix control motor can cause abnormal fan operation, such as the fan running at high speeds even when the desired airflow is low.
What are the causes
Possible causes of the B1245 code may include:
- The rear air mix control motor is faulty: This means that the motor is not working correctly and needs to be fixed or replaced.
- The harness for the rear air mix control motor is open or shorted: The wiring that connects the motor may be damaged or not properly connected.
- There is a poor electrical connection in the rear air mix control motor circuit: This means that there is a loose or corroded electrical connection that is affecting the motor’s performance.
- The climate control unit is faulty: The control unit itself may be defective and not sending the correct signals to the rear air mix control motor.
What Tools are Needed to diagnose
To diagnose the B1245 code effectively, the technician needs specialized diagnostic tools. These tools are necessary to accurately identify the cause of the code and determine the appropriate repairs. Here are some common tools used in the diagnostic process:
- OBD-II Scanner: This tool retrieves the error code from the vehicle’s onboard computer system. It provides valuable information about the specific issue with the Rear Air Mix Control Motor.
- Multimeter: A multimeter measures voltage, resistance, and continuity in the electrical circuits related to the Rear Air Mix Control Motor. It helps identify any open or short circuits and ensures proper electrical connections.
- Wiring Diagrams: These diagrams visually represent the electrical connections and components in the system. They help the technician trace the wiring harness and locate any potential faults or damaged components.
- Service Manual: A comprehensive service manual specific to the vehicle’s make and model is essential for accurate diagnosis. It provides detailed information on the code, diagnostic procedures, and repair instructions.
How to fix Step by Step
Step 1: Check the Rear Air Mix Control Motor for faults.
Step 2: Inspect the wiring harness and connectors for any signs of damage.
Step 3: Ensure that there are no broken, bent, pushed out, or corroded connector pins.
Step 4: Examine the Climate Control Unit for any potential faults.
Step 5: Understand the role and function of the Rear Air Mix Control Motor in diagnosing and fixing the issue.
Step 6: Complete the necessary inspections.
Step 7: Perform any repairs or replacements based on the findings.
Step 8: Consult a professional for an accurate estimate and further guidance.
What are the Common Diagnosis Mistakes
When diagnosing the B1245 code, it is important to be thorough and avoid common errors. Follow these simple tips to ensure an accurate diagnosis:
- Check the rear air mix control motor and its wiring for any damage or disconnection. A faulty motor or a damaged harness can trigger the code.
- Verify that the climate control unit is functioning properly. A malfunctioning unit can also be the cause of the code.
- Make sure all electrical connections are secure and free from corrosion or bent pins. Loose or damaged connections can result in false code readings.
- Conduct a comprehensive diagnostic scan to gather additional trouble codes and data. This will help pinpoint the exact cause of the issue.
What is the Repair Cost
The repair cost for the B1245 code can vary based on factors like location, make, model, and engine type. Labor rates range from $75 to $150 per hour, and the complexity of the issue and diagnostic time can also impact the cost.
Contact a professional for an accurate estimate based on your situation.
Can I drive safely with this code?
No, it is not safe to drive with the B1245 code. Ignoring this code can lead to further damage and safety hazards.
The Rear Air Mix Control Motor regulates temperature and airflow in the rear air conditioning system.
Have the code diagnosed and repaired by a professional technician for safe driving conditions.
Wrapping Up
The B1245 code indicates a problem with the Rear Air Mix Control Motor in the Climate Control Unit. This code can be triggered by various issues such as a faulty motor, wiring harness or connector damage, or poor electrical connections.
It is important to visually inspect and repair any issues found to resolve the problem. The cost to diagnose and fix the B1245 can vary. It is recommended to seek professional assistance for an accurate estimate and to ensure safe driving.