B1738 Code - Mirror Driver Horizontal Switch Circuit Open
Quick Answer
The B1738 diagnostic trouble code (DTC) indicates a problem with the mirror driver horizontal switch circuit being open. Common causes include Faulty mirror switch, Damaged wiring harness, Defective mirror motor. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- B1738 indicates Mirror Driver Horizontal Switch Circuit Open.
- Common causes
- Common causes include Faulty mirror switch, Damaged wiring harness, Defective mirror motor.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code B1738 Description
The B1738 diagnostic trouble code (DTC) indicates a problem with the mirror driver horizontal switch circuit being open. This means that there is an issue with the electrical circuit that controls the horizontal movement of the driver-side mirror. The switch circuit may be disconnected, damaged, or experiencing a malfunction, preventing the mirror from adjusting horizontally as intended.
Common Causes of B1738
- Faulty mirror switch.
- Damaged wiring harness.
- Defective mirror motor.
- Loose or corroded electrical connections.
- Water or moisture damage to the mirror switch or wiring.
Symptoms of B1738
- Inability to adjust the driver-side mirror horizontally.
- Mirror movement is erratic or jerky.
- Mirror movement is slow or unresponsive.
- Mirror adjustment works intermittently.
- Mirror adjustment controls not functioning at all.
How to Fix B1738
- Begin by inspecting the mirror switch for any visible damage or signs of malfunction. Replace the switch if necessary.
- Check the wiring harness for any breaks, fraying, or damage. Repair or replace any damaged wiring.
- Test the mirror motor for proper functionality. Replace the motor if it is defective.
- Inspect and clean any electrical connections to ensure a secure and stable connection.
- Verify the proper operation of the mirror adjustment system after repairs have been made.
Cost to Fix B1738
The cost of repairing a mirror driver horizontal switch circuit open issue can vary depending on the specific components that need to be replaced and the labor rates of the auto repair shop. On average, the repair cost for this type of issue can range from $100 to $300, including parts and labor. It is advisable to consult with a professional mechanic or auto repair shop to get an accurate estimate based on the vehicle make and model, as well as the extent of the electrical issue. Additionally, factors such as diagnostic time and labor rates can also influence the overall repair cost.
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Code B1738 Information for Specific Makes
- B1738 Hyundai — Pressure-Side Impact Sensor Front Driver Wrong ID
- B1738 KIA — Pressure-Side Impact Sensor Front Driver Wrong ID
Frequently Asked Questions about B1738 Code
1. What are the common symptoms of OBDII code B1738 - Mirror Driver Horizontal Switch Circuit Open?
- Common symptoms include the inability to adjust the driver-side mirror horizontally and a malfunctioning mirror switch.
2. What causes the OBDII code B1738 to trigger?
- The code is triggered when there is an open circuit in the mirror driver horizontal switch, often caused by damaged wiring or a faulty switch.
3. How can I diagnose the OBDII code B1738 on my vehicle?
- You can diagnose the code by checking the wiring harness and connections for any damage or corrosion, and testing the mirror switch for continuity.
4. Can a blown fuse cause the OBDII code B1738 to appear?
- Yes, a blown fuse in the mirror circuit can cause an open circuit condition and trigger the B1738 code.
5. Is it safe to continue driving with the OBDII code B1738 present?
- It is generally safe to drive with this code, but you may experience inconvenience due to the inability to adjust the driver-side mirror.
6. How can I repair the OBDII code B1738 at home?
- You can attempt to repair the code at home by checking and repairing any damaged wiring, replacing the mirror switch if necessary, and resetting the fault codes.
7. Are there any common mistakes to avoid when diagnosing the OBDII code B1738?
- One common mistake is overlooking blown fuses in the mirror circuit, which can easily be replaced to resolve the issue.
8. Can extreme weather conditions impact the mirror driver horizontal switch circuit and trigger the B1738 code?
- Yes, extreme weather conditions can lead to moisture or corrosion in the wiring, affecting the mirror switch circuit and triggering the code.
9. Will disconnecting the battery reset the OBDII code B1738?
- Disconnecting the battery may temporarily clear the code, but it is important to diagnose and rectify the underlying issue to prevent the code from reoccurring.
10. Is it recommended to seek professional help for resolving the OBDII code B1738?
- If you are unsure about diagnosing or repairing the code yourself, it is recommended to seek professional help from a qualified mechanic or technician to ensure a proper fix.
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