B2147 Code - Outside Rearview Mirror Position Sensor Input Voltage High
Quick Answer
The Memory Mirror Module (MMM) receives inputs from mirror position sensors during these functions: memory recall, memory seat and easy exit. Common causes include Faulty Outside Rearview Mirror Motor, Outside Rearview Mirror Motor harness is open or shorted, Outside Rearview Mirror Motor circuit poor electrical connection. 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 Motor, Outside Rearview Mirror Motor harness is open or shorted, Outside Rearview Mirror Motor circuit poor electrical connection.
- 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.
Code B2147 Description
What are the Possible Causes of the DTC B2147?
- Faulty Outside Rearview Mirror Motor
- Outside Rearview Mirror Motor harness is open or shorted
- Outside Rearview Mirror Motor circuit poor electrical connection
- Faulty Memory Mirror Module (MMM)
How to Fix the DTC B2147?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B2147 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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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
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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