The B1235 code is a diagnostic trouble code that is associated with the Climate Control Unit in a vehicle. This code indicates a problem within the system that controls the climate settings in the vehicle.
Symptoms of the B1235 code may include issues with the temperature control, such as the inability to adjust the temperature or inconsistent temperature output. Other symptoms may include a malfunctioning fan or unusual noises coming from the climate control system.
The causes of the B1235 code can vary, but common culprits include a faulty Driver Side Air Mix Control Motor or electrical problems such as loose connections or damaged wiring.
To fix the B1235 code, it is recommended to start by checking the possible causes. This may involve inspecting the Driver Side Air Mix Control Motor for any signs of damage or malfunction. Additionally, it is important to inspect the wiring harness and connectors for any loose connections or frayed wires.
B1235 Meaning, Symptoms, Causes, & How to Fix
What does it mean
The B1235 code indicates a problem with the Driver Side Air Mix Control system. This can cause the engine light to come on, affect climate control, and lead to discomfort.
There are no temporary fixes for this code. It’s important to consult a professional for diagnosis and repairs.
What are the symptoms
Symptoms of the B1235 code include:
- Engine Light ON: The B1235 code causes the engine light or service engine soon warning light to turn on.
- Warning Lights: Other warning lights may also turn on, indicating a problem with the climate control system.
- Malfunctioning Climate Control System: The climate control system may not work properly, causing problems with heating, cooling, or ventilation.
- Inconsistent Air Temperature Control: The air temperature control may become inconsistent, resulting in unexpected hot or cold air.
It is important to be aware of these symptoms to accurately diagnose and resolve the B1235 code.
What are the causes
The B1235 code can have several possible causes. These include:
- A problem with the driver side air mix control motor, such as it being faulty or not functioning properly.
- An issue with the harness for the driver side air mix control motor, like it being open or shorted.
- A poor electrical connection in the driver side air mix control motor circuit.
- A faulty climate control unit.
It is important to address this code promptly as it can affect the climate control system’s performance. This can result in inconsistent air temperature control and potential safety risks.
What Tools are Needed to diagnose
To diagnose the B1235 code, a professional technician needs specific tools and equipment. Here are the commonly used tools for diagnosing the B1235 code:
- Diagnostic scan tool: This tool is essential for retrieving the B1235 code from the vehicle’s onboard computer. It allows the technician to access and understand the diagnostic trouble codes stored in the system.
- Multimeter: A multimeter is used to measure voltage, resistance, and continuity in the electrical circuits related to the driver side air mix control motor. This helps identify any issues with open circuits, short circuits, or poor electrical connections.
- Wiring diagram: A wiring diagram provides a visual representation of the electrical circuits involved in the driver side air mix control system. It helps the technician trace the circuit and identify any potential problems with the wiring harness or connectors.
- Climate control unit tester: This specialized tool tests the functionality of the climate control unit, which monitors the driver side air mix control motor. It helps determine if the unit is working correctly or if it needs replacement.
How to fix Step by Step
Step 1: Check the possible causes listed for the DTC B1235 code.
Step 2: Visually inspect the related wiring harness and connectors.
Step 3: Look for any damaged components.
Step 4: Examine the connector pins for signs of breakage, bending, pushing out, or corrosion.
Step 5: Based on the findings, perform necessary repairs or replacements.
Step 6: Avoid common mistakes during diagnosis, such as neglecting to thoroughly inspect the wiring harness or connectors, overlooking damaged components, or failing to address poor electrical connections.
Step 7: Follow a systematic approach and avoid these mistakes to effectively diagnose and resolve the DTC B1235 code.
What are the Common Diagnosis Mistakes
One mistake that is often made when diagnosing the DTC B1235 code is not thoroughly inspecting the wiring harness or connectors. To avoid this and other diagnostic errors, it is important to follow these troubleshooting tips:
- Visual Inspection: Always visually inspect the wiring harness and connectors for any signs of damage or corrosion. This step helps identify potential issues that may be causing the B1235 code.
- Component Checks: Ensure to check for broken, bent, pushed out, or corroded connector pins. These problems can disrupt the electrical connection and trigger the code.
- Consider Other Causes: While the B1235 code is commonly associated with the driver side air mix control motor, it is essential to consider other potential causes. Faulty climate control unit or poor electrical connections can also contribute to the code.
- Perform Necessary Repairs: Once the issue is identified, it is crucial to promptly perform the necessary repairs or replacements based on the findings. Ignoring or delaying the repairs can lead to further complications and potentially more expensive repairs.
What is the Repair Cost
The cost to diagnose and repair the B1235 code can vary depending on factors such as location, make, model, and engine type. Labor costs for diagnosis typically range from 1.0 hour, with most auto repair shops charging between $75 and $150 per hour.
Contact a professional for an accurate cost estimate, as additional costs may apply for parts and further repairs.
Can I drive safely with this code?
Driving safely with the B1235 code is not recommended. This code indicates a problem with the Driver Side Air Mix Control Motor, which regulates the air temperature in the climate control system.
Continuing to drive with this code can cause further damage to the climate control system and affect vehicle performance.
It is best to consult a professional for accurate diagnosis and repairs.
Wrapping Up: B1235 Code
The B1235 code is a diagnostic trouble code related to the Climate Control Unit in a vehicle. It indicates a deviation from factory specifications in the Driver Side Air Mix Control Motor, which can result in various symptoms such as inconsistent air temperature control and malfunctioning climate control system.
To diagnose and fix the issue, it is recommended to check the possible causes, inspect the related wiring harness and connectors, and perform any necessary repairs or replacements based on findings. Contacting a professional for an accurate cost estimate is advised.