B2146 GMC Code - Outside Rearview Mirror Position Sensor Input Voltage Low
Quick Answer
The B2146 GMC code indicates that the Outside Rearview Mirror Position Sensor Input Voltage is low. Common causes include Faulty outside rearview mirror position sensor, Damaged wiring or connectors leading to the sensor, Issues with the control module that receives input from the sensor. 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
- B2146 GMC indicates Outside Rearview Mirror Position Sensor Input Voltage Low.
- Common causes
- Common causes include Faulty outside rearview mirror position sensor, Damaged wiring or connectors leading to the sensor, Issues with the control module that receives input from the sensor.
- 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 B2146 GMC Description
The B2146 GMC code indicates that the Outside Rearview Mirror Position Sensor Input Voltage is low. This sensor is responsible for detecting the position of the outside rearview mirror and sending the information to the vehicle's control module. When the input voltage is low, it means that the sensor is not receiving enough power to function properly, which can lead to issues with adjusting and positioning the mirror.
Common Causes of B2146 GMC
- Faulty outside rearview mirror position sensor.
- Damaged wiring or connectors leading to the sensor.
- Issues with the control module that receives input from the sensor.
- Electrical system issues causing a drop in voltage to the sensor.
Symptoms of B2146 GMC
- Inability to adjust the outside rearview mirror.
- Erratic movement of the mirror when attempting to adjust it.
- Warning light on the dashboard indicating a mirror malfunction.
- Mirror position not holding after adjustment.
How to Fix B2146 GMC
- Begin by diagnosing the specific cause of the low input voltage using a diagnostic scanner.
- Inspect the wiring and connectors leading to the outside rearview mirror position sensor for any damage or corrosion. Repair or replace as necessary.
- Test the sensor itself to determine if it is functioning properly. Replace the sensor if it is faulty.
- Check the control module for any issues and replace if necessary.
- Clear the diagnostic trouble code from the vehicle's system and test the mirror to ensure proper functionality.
Cost to Fix B2146 GMC
The typical repair costs for addressing a B2146 GMC code can vary depending on the specific cause of the issue. In general, you can expect to pay between $100 and $300 for parts and labor. However, it's important to note that diagnostic time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It's advisable to check with local shops for a more accurate estimate based on your specific circumstances.
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Frequently Asked Questions about B2146 GMC Code
1. What does the OBDII code B2146 mean on a GMC vehicle?
B2146 indicates that the input voltage from the outside rearview mirror position sensor is lower than the expected range.
2. What are the common symptoms of the B2146 code in a GMC?
Symptoms may include malfunctioning or unresponsive power mirrors, a check engine light, or issues with memory seat and mirror settings.
3. What causes the B2146 code to appear on a GMC?
Common causes include a faulty mirror position sensor, damaged wiring or connections, or a malfunctioning power mirror control module.
4. Can the B2146 code affect the operation of other features in the vehicle?
Yes, it can interfere with memory settings for mirrors and seats, especially on models with advanced memory systems.
5. How do I diagnose the B2146 code on my GMC?
Start by checking the wiring and connections to the mirror position sensor for damage or corrosion. Then, test the sensor for proper voltage and functionality.
6. Can I still drive my GMC with the B2146 code active?
Yes, you can still drive the vehicle, but you may lose functionality of certain features like power mirrors or memory settings.
7. What tools are needed to fix the B2146 code on a GMC?
You’ll need a multimeter to test voltage, an OBDII scanner to clear the code, and possibly a replacement sensor or wiring repair tools.
8. How much does it cost to repair the B2146 code on a GMC?
The cost varies but typically ranges from $50 to $200, depending on whether the issue is a simple wiring fix or requires a new sensor/module.
9. Can the B2146 code be caused by a software issue?
While rare, a software glitch in the power mirror control module could trigger this code and may require reprogramming.
10. How can I prevent the B2146 code from recurring on my GMC?
Regularly inspect and maintain the wiring and connectors for the mirror position sensors to prevent corrosion or damage.
Discuss the causes and fixes for B2146 GMC OBDII Code
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