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Engine-Codes – Generic – B2147

B2147 Code - Outside Rearview Mirror Position Sensor Input Voltage High

Quick Answer

The B2147 diagnostic trouble code (DTC) indicates that the outside rearview mirror position sensor input voltage is reading higher than the normal operating range. Common causes include Faulty outside rearview mirror position sensor, Wiring issues such as shorts or open circuits in the mirror system, Corrosion or damage to the electrical connections. 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
B2147 indicates Outside Rearview Mirror Position Sensor Input Voltage High.
Common causes
Common causes include Faulty outside rearview mirror position sensor, Wiring issues such as shorts or open circuits in the mirror system, Corrosion or damage to the electrical connections.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 11, 2024
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Code B2147 Description

The B2147 diagnostic trouble code (DTC) indicates that the outside rearview mirror position sensor input voltage is reading higher than the normal operating range. This sensor is responsible for detecting the position of the exterior rearview mirror and relaying that information to the vehicle's control module. When the input voltage is too high, it can cause issues with the mirror's positioning and adjustment functions.

OBDII Code B2147 - Outside Rearview Mirror Position Sensor Input Voltage High
B2147 Code - Outside Rearview Mirror Position Sensor Input Voltage High

Common Causes of B2147

  1. Faulty outside rearview mirror position sensor.
  2. Wiring issues such as shorts or open circuits in the mirror system.
  3. Corrosion or damage to the electrical connections.
  4. Issues with the control module that receives input from the sensor.
  5. Water ingress or physical damage to the mirror assembly affecting sensor operation.

Symptoms of B2147

  1. Outside rearview mirror not responding to adjustment controls.
  2. Mirror position changing erratically or unpredictably.
  3. Mirror getting stuck in one position and not moving.
  4. Warning light on the dashboard indicating a mirror system fault.
  5. In some cases, the mirror may make unusual noises while trying to adjust.

How to Fix B2147

  1. Begin by conducting a visual inspection of the outside rearview mirror assembly, checking for any visible damage or loose connections.
  2. Use a multimeter to test the voltage output of the position sensor and compare it to the manufacturer's specifications.
  3. Inspect the wiring harness for any signs of damage or corrosion, repairing or replacing any faulty wires as needed.
  4. If the sensor is determined to be faulty, replace it with a new one and recalibrate the mirror position.
  5. Clear the DTC from the vehicle's onboard computer using a diagnostic scanner to reset the system and ensure the code does not reappear.

Cost to Fix B2147

The typical repair costs for addressing the B2147 code can vary depending on the specific vehicle make and model, as well as the labor rates at the auto repair shop. On average, repairing an outside rearview mirror position sensor input voltage high issue can range from $100 to $300, including parts and labor. However, the total cost may be higher if additional components need replacement or if the sensor is part of a more complex mirror system. It is advisable to consult with a qualified mechanic or dealership to obtain a precise estimate based on your vehicle's requirements and location. Keep in mind that diagnostic time and labor rates can fluctuate, so it's essential to inquire about these factors when seeking repair services.

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Code B2147 Information for Specific Makes

  • B2147 Buick — Outside Rearview Mirror Position Sensor Input Voltage High
  • B2147 Cadillac — Outside Rearview Mirror Position Sensor Input Voltage High
  • B2147 Chevrolet — Outside Rearview Mirror Position Sensor Input Voltage High
  • B2147 GMC — Outside Rearview Mirror Position Sensor Input Voltage High
About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B2147 Code

1. What are the common symptoms of OBDII code B2147?

The common symptoms of OBDII code B2147 include erratic movement or failure of the outside rearview mirrors, incorrect mirror positioning, and illuminated warning lights on the dashboard.

2. What causes the OBDII code B2147 to trigger?

The OBDII code B2147 is triggered when the outside rearview mirror position sensor detects a higher than normal input voltage, indicating a potential issue with the sensor or its wiring.

3. How can I diagnose the OBDII code B2147?

Diagnosing the OBDII code B2147 involves using a scan tool to read the code, checking the wiring and connections to the outside rearview mirror position sensor, and testing the sensor itself for proper functionality.

4. Can a faulty outside rearview mirror position sensor be repaired?

In some cases, a faulty outside rearview mirror position sensor may be repairable by cleaning or recalibrating it. However, if the sensor is damaged or malfunctioning, it may need to be replaced.

5. Are there any DIY repair tips for OBDII code B2147?

DIY repair tips for OBDII code B2147 include checking the sensor wiring for any visible damage, ensuring proper electrical connections, and consulting the vehicle's service manual for specific troubleshooting steps.

6. Is it safe to drive with the OBDII code B2147 active?

It is generally safe to drive with the OBDII code B2147 active, but it is recommended to address the issue promptly to prevent further damage to the outside rearview mirror system.

7. How much does it typically cost to repair OBDII code B2147?

The cost to repair OBDII code B2147 can vary depending on the cause of the issue, labor rates, and the price of replacement parts. It is recommended to consult with a professional mechanic for an accurate estimate.

8. Can OBDII code B2147 affect other vehicle systems?

OBDII code B2147 specifically relates to the outside rearview mirror position sensor and is unlikely to directly affect other vehicle systems. However, it is still important to address the issue to maintain overall vehicle functionality.

9. Will resetting the OBDII code B2147 make it go away permanently?

Resetting the OBDII code B2147 may temporarily clear the code, but if the underlying issue with the outside rearview mirror position sensor is not resolved, the code is likely to return. It is important to diagnose and repair the root cause of the problem.

10. Can extreme weather conditions cause OBDII code B2147 to trigger?

Extreme weather conditions such as high temperatures or moisture can potentially affect the outside rearview mirror position sensor and lead to the triggering of OBDII code B2147. Inspecting and protecting the sensor from environmental factors may help prevent this issue.

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