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AutoCodes - Generic - B2151

B2151 Code - Outside Rearview Mirror Position Sensor Input Voltage High

- Code Popularity: 4,691 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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By AutoCodes.com - Updated Sep 19, 2019
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|Code B2151 Possible Causes

  • 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 do I Fix the Code B2151?

Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

Does your Car have Safety Recalls? → Check here

|What is the Cost to Diagnose the Code B2151?

Labor: 1.0

The cost of diagnosing the B2151 code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

|What are Code B2151 Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

|Code B2151 Description

The Memory Mirror Module (MMM) receives inputs from mirror position sensors during these functions: memory recall, memory seat and easy exit. Potentiometers in position sensors vary in resistance as motors move outside rearview mirror. MMM receives a variable voltage input depending on resistance of the potentiometer. During memory set, MMM records voltage across mirrors. During memory recall, MMM moves mirror motors until the voltage across each potentiometer matches recorded the voltage. During normal operation, mirror position sensors are checked against out-of-range limits. Outside rearview mirrors horizontal and vertical position sensor input voltage is 4.75 volts or more.

OBDII Code B2151 - Outside Rearview Mirror Position Sensor Input Voltage High - AutoCodes.com
B2151 Code - Outside Rearview Mirror Position Sensor Input Voltage High

|Need More Information on the B2151 Code?

Need more information on how to fix the B2151 code? Get Access to Factory Service Manuals

|Information for Specific Makes

  • B2151 Buick Outside Rearview Mirror Position Sensor Input Voltage High
  • B2151 Cadillac Outside Rearview Mirror Position Sensor Input Voltage High
  • B2151 Chevrolet Outside Rearview Mirror Position Sensor Input Voltage High
  • B2151 GMC Outside Rearview Mirror Position Sensor Input Voltage High

|Need Help with the B2151 Code?

Get the B2151 code diagnosed by a professional: Find a repair shop in your area

|Code B2151 comments

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