B2146 Code - Outside Rearview Mirror Position Sensor Input Voltage Low
Quick Answer
The B2146 diagnostic trouble code (DTC) 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 in the sensor circuit, Corrosion or poor electrical connections in the sensor circuit. 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 indicates Outside Rearview Mirror Position Sensor Input Voltage Low.
- Common causes
- Common causes include Faulty outside rearview mirror position sensor, Damaged wiring or connectors in the sensor circuit, Corrosion or poor electrical connections in the sensor circuit.
- 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 Description
The B2146 diagnostic trouble code (DTC) 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 this information to the vehicle's control module. When the input voltage is low, it means that the sensor is not receiving the expected electrical signal, which can lead to issues with mirror adjustment and positioning.
Common Causes of B2146
- Faulty outside rearview mirror position sensor.
- Damaged wiring or connectors in the sensor circuit.
- Corrosion or poor electrical connections in the sensor circuit.
- Issues with the control module receiving input from the sensor.
Symptoms of B2146
- Inability to adjust the outside rearview mirrors electronically.
- Erratic movement or positioning of the mirrors.
- Warning light on the dashboard related to mirror system.
- Mirror adjustment controls not responding or working intermittently.
How to Fix B2146
- Begin by conducting a visual inspection of the outside rearview mirror position sensor, wiring, and connectors for any visible damage or corrosion.
- Use a multimeter to test the voltage output of the sensor to determine if it is within the expected range.
- If the sensor is faulty, replace it with a new one following the manufacturer's guidelines.
- Check and repair any damaged wiring or connectors in the sensor circuit.
- Clear the DTCs from the vehicle's memory using a diagnostic scan tool and test the mirror adjustment functionality to ensure proper operation.
Cost to Fix B2146
The typical repair costs for addressing the B2146 code can vary depending on the specific cause of the issue and the cost of parts and labor. In general, replacing the outside rearview mirror position sensor can range from $100 to $200, while addressing wiring or connector issues may add to the total cost. Labor rates at auto repair shops can vary between $80 and $150 per hour, so it's advisable to check local rates for a more accurate estimate.
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Code B2146 Information for Specific Makes
- B2146 Buick — Outside Rearview Mirror Position Sensor Input Voltage Low
- B2146 Cadillac — Outside Rearview Mirror Position Sensor Input Voltage Low
- B2146 Chevrolet — Outside Rearview Mirror Position Sensor Input Voltage Low
- B2146 GMC — Outside Rearview Mirror Position Sensor Input Voltage Low
Frequently Asked Questions about B2146 Code
What does the OBDII code B2146 mean?
B2146 indicates a low input voltage from the outside rearview mirror position sensor, which is responsible for adjusting the mirror's position.
What symptoms might indicate a B2146 code?
Common symptoms include the inability to adjust the outside rearview mirror, erratic mirror movement, or the mirror being stuck in one position.
What could cause the B2146 code to trigger?
Potential causes include a faulty position sensor, damaged wiring or connectors, or issues with the vehicle's body control module.
How can I diagnose the B2146 code?
Start by inspecting the wiring and connectors related to the outside rearview mirror for damage or corrosion. Then, test the position sensor with a multimeter to check for proper voltage readings.
What are the common repair steps for a B2146 code?
Repair steps may include replacing the faulty outside rearview mirror position sensor, repairing damaged wiring, or replacing the body control module if it's found to be defective.
Can I drive my car with the B2146 code?
Yes, you can drive the car, but you may experience issues with mirror adjustments. It's advisable to address the code to ensure proper visibility and safety.
How do I clear the B2146 code after repairs?
You can clear the code using an OBDII scanner. After making the necessary repairs, connect the scanner and select the option to clear or erase trouble codes.
Is the B2146 code specific to certain vehicle makes or models?
While B2146 can appear in various vehicles, it is more commonly associated with certain makes like GM, Ford, and Chrysler. Always consult the vehicle's service manual for specific information.
What should I do if the B2146 code keeps returning after repairs?
If the code reappears, reassess the wiring and connectors for hidden issues, check for any software updates, or consider consulting a professional mechanic for a more thorough diagnosis.
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