AutoCodes – RAM – B1D20 RAM

B1D20 RAM Code - Mirror Vertical Motor Control Circuit High

Quick Answer

When the Memory Mirror Module senses voltage present on the Mirror Vertical Motor Driver circuit, when there should not be, for over 10ms, this Diagnostic Trouble Code (DTC) will set. Common causes include Faulty Mirror Motor, Mirror Motor harness is open or shorted, 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: B1D20 RAM indicates Mirror Vertical Motor Control Circuit High.
Common causes: Common causes include Faulty Mirror Motor, Mirror Motor harness is open or shorted, 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.

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Code Popularity 521

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 27, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1D20 RAM Description

When the Memory Mirror Module senses voltage present on the Mirror Vertical Motor Driver circuit, when there should not be, for over 10ms, this Diagnostic Trouble Code (DTC) will set.

OBDII Code B1D20 RAM - Mirror Vertical Motor Control Circuit High - AutoCodes.com — B1D20 RAM Code - Mirror Vertical Motor Control Circuit High

What does this mean?

What are the Possible Causes of the DTC B1D20 RAM?

Faulty Mirror Motor
Mirror Motor harness is open or shorted
Mirror Motor circuit poor electrical connection
Faulty Memory Mirror Module

How to Fix the DTC B1D20 RAM?

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 B1D20 RAM 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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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 B1D20 RAM Code

1. What are the common symptoms of OBDII code B1D20 RAM titled Mirror Vertical Motor Control Circuit High?

The common symptoms of this code may include the mirror not adjusting vertically, erratic movement of the mirror, or complete mirror failure.

2. What are the possible causes of OBDII code B1D20 RAM?

The possible causes of this code can be a faulty vertical motor, damaged wiring or connectors in the mirror control circuit, or a problem with the mirror switch.

3. How can I diagnose the OBDII code B1D20 RAM?

Diagnosing this code involves checking the wiring and connectors in the mirror control circuit, testing the vertical motor for proper function, and inspecting the mirror switch for any issues.

4. Can I repair OBDII code B1D20 RAM myself?

Repairing this code may be possible if you have the necessary tools and expertise. It typically involves replacing the faulty vertical motor, repairing damaged wiring or connectors, or fixing issues with the mirror switch.

5. Is it safe to continue driving with OBDII code B1D20 RAM active?

It is generally safe to continue driving with this code, but it is recommended to address the issue promptly to ensure proper functionality of the mirror and to avoid any inconvenience while driving.

6. How much does it cost to repair OBDII code B1D20 RAM?

The cost of repairing this code can vary depending on the extent of the issue and the specific components that need to be replaced. It is advisable to consult a professional for an accurate estimate.

7. Can a faulty mirror vertical motor cause other problems in the vehicle?

A faulty mirror vertical motor may not directly cause other problems in the vehicle, but it can affect the convenience and safety features associated with the mirror adjustment function.

8. Are there any preventive measures to avoid OBDII code B1D20 RAM?

To prevent this code from occurring, regular inspection of the mirror control circuit, wiring, and connectors is recommended. Keeping the mirror components clean and well-maintained can also help prevent issues.

9. Will resetting the OBDII code B1D20 RAM make it go away permanently?

Resetting the code may temporarily clear it, but if the underlying issue is not addressed, the code is likely to reappear. It is important to diagnose and repair the root cause of the problem.

10. Can environmental factors affect the mirror vertical motor control circuit and trigger OBDII code B1D20 RAM?

Extreme weather conditions or exposure to moisture can potentially damage the mirror control circuit, wiring, or connectors, leading to the activation of this OBDII code.