AutoCodes – Dodge – B1D21 Dodge

B1D21 Dodge Code - Mirror Vertical Motor Control Circuit Open

Quick Answer

When the Memory Mirror Module senses an open condition on the Mirror Vertical Motor Driver circuit during a mirror operation, 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: B1D21 Dodge indicates Mirror Vertical Motor Control Circuit Open.
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 613

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 B1D21 Dodge Description

When the Memory Mirror Module senses an open condition on the Mirror Vertical Motor Driver circuit during a mirror operation, for over 10ms, this Diagnostic Trouble Code (DTC) will set.

OBDII Code B1D21 Dodge - Mirror Vertical Motor Control Circuit Open - AutoCodes.com — B1D21 Dodge Code - Mirror Vertical Motor Control Circuit Open

What does this mean?

What are the Possible Causes of the DTC B1D21 Dodge?

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 B1D21 Dodge?

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 B1D21 Dodge 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 B1D21 Dodge Code

1. What are the common symptoms of OBDII code B1D21 Dodge (Mirror Vertical Motor Control Circuit Open)?

The common symptoms include non-responsive or erratic movement of the vertical mirror control, and potential loss of functionality in adjusting the mirror vertically.

2. What can cause the OBDII code B1D21 Dodge to trigger?

The code B1D21 is triggered when the mirror vertical motor control circuit is detected to be open, indicating a fault in the electrical circuit controlling the vertical movement of the mirror.

3. How serious is the OBDII code B1D21 Dodge (Mirror Vertical Motor Control Circuit Open)?

While the code may not affect the overall drivability of the vehicle, it can lead to inconvenience and potential safety issues if the mirror adjustment is compromised.

4. How can I diagnose the issue related to code B1D21 Dodge?

Diagnosing the issue involves checking the wiring and connections related to the vertical mirror motor, testing the mirror control switch, and using a multimeter to check for continuity in the circuit.

5. What are some possible repair tips for resolving the OBDII code B1D21 Dodge?

Repair tips include inspecting and repairing any damaged wiring or connectors, replacing the mirror vertical motor if necessary, and resetting the fault code after the repair.

6. Can I fix the Mirror Vertical Motor Control Circuit Open issue myself?

If you have experience with automotive electrical systems and the necessary tools, you may be able to diagnose and repair the issue yourself. However, if you are unsure, it is recommended to seek professional help.

7. Is it safe to drive with the OBDII code B1D21 Dodge active?

While it may be safe to drive with the code active, it is important to ensure proper functionality of the mirrors for optimal visibility and safety on the road.

8. Are there any preventive measures to avoid encountering the B1D21 Dodge code in the future?

Regularly inspecting the mirror controls, addressing any electrical issues promptly, and avoiding physical damage to the mirrors can help prevent the occurrence of the B1D21 Dodge code.

9. How long does it typically take to repair the Mirror Vertical Motor Control Circuit Open issue?

The repair time can vary depending on the exact cause of the issue and the extent of the repair needed. It can range from a quick fix to a more involved repair requiring professional assistance.

10. Can the OBDII code B1D21 Dodge affect other vehicle systems?

While the code specifically relates to the mirror vertical motor control circuit, electrical issues in one part of the vehicle can sometimes lead to complications in other systems. It is important to address the code promptly to prevent any potential cascading effects.