AutoCodes – Acura – B1221 Acura

B1221 Acura Code - Open In The Rear Mode Control Motor Circuit

Quick Answer

The Rear Climate Control Unit monitors the Rear Mode Control Motor. Common causes include Faulty Rear Mode Control Motor, Rear Mode Control Motor harness is open or shorted, Rear Mode Control Motor circuit poor electrical connection. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means: B1221 Acura indicates Open In The Rear Mode Control Motor Circuit.
Common causes: Common causes include Faulty Rear Mode Control Motor, Rear Mode Control Motor harness is open or shorted, Rear Mode Control Motor circuit poor electrical connection.
Severity: Low - monitor the vehicle and repair when practical.
Can I drive?: The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

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Code Popularity 1,245

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Nov 19, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1221 Acura Description

The Rear Climate Control Unit monitors the Rear Mode Control Motor. The Rear Climate Control Unit sets the OBDII code when the Rear Mode Control Motor is not to factory specifications.

OBDII Code B1221 Acura - Open In The Rear Mode Control Motor Circuit - AutoCodes.com — B1221 Acura Code - Open In The Rear Mode Control Motor Circuit

What does this mean?

What are the Possible Causes of the DTC B1221 Acura?

Faulty Rear Mode Control Motor
Rear Mode Control Motor harness is open or shorted
Rear Mode Control Motor circuit poor electrical connection
Faulty Rear Climate Control Unit
Faulty A/C Control Panel

How to Fix the DTC B1221 Acura?

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 B1221 Acura 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.

Need more information about the B1221 Acura code?

Need more information on how to fix the B1221 Acura code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1221 Acura code diagnosed by a professional: Find a repair shop in your area

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 B1221 Acura Code

1. What are the common symptoms of OBDII code B1221 in Acura vehicles?

The common symptoms include erratic or non-responsive rear mode control motor, inconsistent air conditioning performance, and inability to adjust air flow direction.

2. What causes the OBDII code B1221 "Open In The Rear Mode Control Motor Circuit" in Acura cars?

This code is typically triggered by a faulty rear mode control motor, damaged wiring in the control circuit, or a malfunctioning HVAC control unit.

3. How can I diagnose the issue related to OBDII code B1221 in my Acura?

You can diagnose the problem by checking the rear mode control motor for proper operation, inspecting the wiring harness for any visible damage, and using a multimeter to test for continuity in the circuit.

4. Can I repair the Open In The Rear Mode Control Motor Circuit issue in my Acura at home?

If you have the necessary tools and experience with automotive electrical systems, you may be able to repair this issue at home by replacing the rear mode control motor, repairing damaged wiring, or resetting the HVAC control unit.

5. Is it safe to continue driving my Acura with the B1221 code present?

It is not recommended to continue driving your vehicle with the B1221 code, as it can lead to further HVAC system malfunctions and discomfort while driving. It is best to address the issue promptly.

6. Will resetting the OBDII code B1221 make it go away permanently?

Resetting the code may temporarily turn off the check engine light, but if the underlying issue causing the code is not addressed, it is likely to reappear. It is important to diagnose and repair the root cause of the problem.

7. How much does it typically cost to repair the Open In The Rear Mode Control Motor Circuit issue in an Acura?

The cost of repairing the B1221 code can vary depending on the specific cause of the issue, but it may range from $100 to $300 for parts and labor at a mechanic's shop.

8. Can extreme weather conditions affect the occurrence of the B1221 code in Acura vehicles?

Yes, extreme temperatures and humidity levels can potentially worsen the symptoms related to the B1221 code, as the HVAC system may have to work harder to maintain the desired air flow and temperature settings.

9. Are there any preventive maintenance tips to avoid encountering the B1221 code in the future?

Regularly inspecting and maintaining your Acura's HVAC system, including checking the rear mode control motor and wiring connections, can help prevent issues that may trigger the B1221 code.

10. Will replacing the rear mode control motor in my Acura eliminate the B1221 code?

Replacing the rear mode control motor may resolve the B1221 code if the motor is the root cause of the issue. However, it is important to ensure proper diagnosis and repair of any other related components to prevent the code from reappearing.