B1D21 Jeep 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 Jeep 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.
Code B1D21 Jeep Description
What are the Possible Causes of the DTC B1D21 Jeep?
- 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 Jeep?
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 Jeep 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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Frequently Asked Questions about B1D21 Jeep Code
1. What does the OBDII code B1D21 mean on a Jeep?
The code B1D21 indicates an issue with the mirror vertical motor control circuit, specifically an open circuit preventing proper operation of the vertical adjustment motor.
2. What are the common symptoms of the B1D21 code?
Symptoms include the inability to adjust the side mirror vertically, unresponsive mirror controls, or no sound from the mirror motor when adjusting.
3. What causes the B1D21 code to appear?
The code is typically caused by a broken or disconnected wire, a faulty mirror adjustment motor, damaged connectors, or an issue with the mirror control module.
4. Can the B1D21 code affect other vehicle systems?
No, this code generally only affects the mirror adjustment system and does not impact other vehicle systems.
5. How do I diagnose the B1D21 code?
Start by checking the wiring and connectors for damage or disconnection, then test the mirror adjustment motor and control module for proper operation.
6. How can I fix the B1D21 code on my Jeep?
Repairs may involve reconnecting or replacing damaged wiring, repairing or replacing the mirror adjustment motor, or addressing any control module issues.
7. Is it safe to drive with the B1D21 code?
Yes, it is safe to drive, but you may lose vertical adjustment functionality in the affected mirror, which may reduce visibility and convenience.
8. How much does it cost to repair a B1D21 code?
Repair costs can vary, but fixing wiring or connectors may cost under $100, while replacing the mirror motor or control module could range from $150 to $500 depending on parts and labor.
9. Can I clear the B1D21 code without fixing the issue?
You can clear the code with an OBDII scanner, but it will likely return if the underlying issue is not resolved.
10. Does the B1D21 code apply to all Jeep models?
The B1D21 code is specific to Jeep vehicles equipped with electronically adjustable mirrors, but the exact affected models may vary. Always consult your vehicle’s manual or technical resources.
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