How to Fix B1268 Servo Motor Potentiometer Defrost Circuit Failure
If you’re experiencing issues with your car’s heating and cooling system, specifically the defrost circuit, you may have encountered the B1268 Servo Motor Potentiometer Defrost Circuit Failure error code. This can be a frustrating problem to deal with, but with the right tools and knowledge, you can fix it yourself. In this article, we’ll provide step-by-step instructions on how to fix the B1268 error code and get your car’s defrost circuit working properly again.
What is the B1268 Error Code?
The B1268 error code is a diagnostic trouble code (DTC) that indicates a problem with the servo motor potentiometer in the defrost circuit. The servo motor potentiometer is responsible for controlling the movement of the defrost door, which directs air to the windshield for defrosting. When the potentiometer fails, the defrost door may not move properly, resulting in poor defrosting performance or no defrosting at all.
Tools and Materials Needed
Before you begin fixing the B1268 error code, you’ll need to gather a few tools and materials. Here’s what you’ll need:
- Socket set
- Electrical contact cleaner
- Replacement servo motor potentiometer
Step-by-Step Guide to Fixing the B1268 Error Code
Now that you have your tools and materials ready, let’s get started on fixing the B1268 error code. Follow these steps:
Step 1: Disconnect the Battery
Before you begin any work on your car’s electrical system, it’s important to disconnect the battery to prevent any electrical shocks or damage. Locate the battery in your car and use a socket wrench to loosen the negative terminal. Once the terminal is loose, remove it from the battery and set it aside.
Step 2: Remove the Dashboard Cover
To access the servo motor potentiometer, you’ll need to remove the dashboard cover. Use a screwdriver to remove any screws or clips holding the cover in place. Once the cover is removed, you should be able to see the defrost circuit and the servo motor potentiometer.
Step 3: Remove the Servo Motor Potentiometer
Using a socket set, remove the screws holding the servo motor potentiometer in place. Once the screws are removed, gently pull the potentiometer out of its housing. Be careful not to damage any of the wires or connectors.
Step 4: Clean the Electrical Contacts
Using electrical contact cleaner, spray the electrical contacts on the servo motor potentiometer and the connectors in the housing. This will help remove any dirt or debris that may be causing the B1268 error code.
Step 5: Install the Replacement Servo Motor Potentiometer
Insert the replacement servo motor potentiometer into the housing and secure it with the screws. Make sure the potentiometer is properly aligned and connected to the wiring harness.
Step 6: Reinstall the Dashboard Cover
Once the replacement potentiometer is installed, reattach the dashboard cover using the screws or clips you removed earlier.
Step 7: Reconnect the Battery
Finally, reconnect the negative terminal of the battery and tighten it with a socket wrench. This will restore power to your car’s electrical system.
Fixing the B1268 Servo Motor Potentiometer Defrost Circuit Failure error code may seem daunting, but with the right tools and knowledge, it’s a relatively simple process. By following the step-by-step guide we’ve provided, you can get your car’s defrost circuit working properly again and enjoy a clear view of the road ahead.
1. Can I fix the B1268 error code myself?
Yes, you can fix the B1268 error code yourself with the right tools and knowledge. However, if you’re not comfortable working on your car’s electrical system, it’s best to take it to a professional mechanic.
2. How do I know if the servo motor potentiometer is the problem?
If you’re experiencing issues with your car’s defrost circuit and have received the B1268 error code, it’s likely that the servo motor potentiometer is the problem. However, it’s always a good idea to have a professional mechanic diagnose the issue to be sure.
3. How can I prevent the B1268 error code from happening again?
To prevent the B1268 error code from happening again, make sure to keep your car’s electrical contacts clean and free of debris. You can also have your car’s heating and cooling system inspected regularly by a professional mechanic to catch any potential issues before they become bigger problems.