B1269 – OBD-II DTC

OBD-II DTC B1269 – Servo Motor Potentiometer Defrost Circuit Open

DTC B1269 meaning

DTC B1269 refers to a diagnostic trouble code indicating an issue with the servo motor potentiometer in the defrost circuit. This code is triggered when the powertrain control module (PCM) detects an open circuit condition in the potentiometer that regulates the position of the servo motor responsible for controlling the defrost function in the vehicle’s climate control system.

DTC B1269 symptoms

Common symptoms associated with DTC B1269 may include:

• Inoperative defrost function
• Erratic or inconsistent airflow from the defrost vents
• Warning lights illuminated on the dashboard
• Increased cabin humidity or fogging on the windshield

DTC B1269 causes

Several factors can lead to the triggering of DTC B1269, including:

• Faulty servo motor potentiometer
• Wiring issues such as frayed or broken wires
• Corroded or loose electrical connectors
• Defective climate control module
• Software issues within the vehicle’s control systems

DTC B1269 seriousness

The seriousness of DTC B1269 can vary. While it may not pose an immediate safety risk, it can lead to reduced visibility due to improper defrosting of the windshield, which can be dangerous in adverse weather conditions. Additionally, it may indicate underlying issues that could affect the overall performance of the vehicle’s climate control system.

How to diagnose DTC B1269

To diagnose DTC B1269, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the DTC.
2. Inspect the wiring and connectors associated with the servo motor potentiometer for damage or corrosion.
3. Test the servo motor potentiometer for proper resistance values using a multimeter.
4. Check the climate control module for any software updates or faults.
5. Clear the DTC and perform a road test to see if the code reappears.

How to fix DTC B1269 step-by-step instructions

To fix DTC B1269, follow these steps:

1. Inspect and repair any damaged wiring or connectors related to the servo motor potentiometer.
2. Replace the faulty servo motor potentiometer if testing indicates it is defective.
3. Ensure all electrical connections are secure and free of corrosion.
4. Update the climate control module software if necessary.
5. Clear the DTC using an OBD-II scanner and test the system to ensure proper operation.

How to erase DTC B1269

To erase DTC B1269, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn on the ignition without starting the engine.
3. Access the trouble codes menu on the scanner.
4. Select the option to clear or erase the codes.
5. Confirm the action and wait for the scanner to indicate that the codes have been cleared.

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