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Engine-Codes – Generic – B1222

B1222 Code - Short In The Rear Mode Control Motor Circuit

Quick Answer

The B1222 diagnostic trouble code (DTC) indicates a short in the rear mode control motor circuit. Common causes include Damaged wiring or connectors in the rear mode control motor circuit, Faulty rear mode control motor, Issues with the HVAC control module. 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
B1222 indicates Short In The Rear Mode Control Motor Circuit.
Common causes
Common causes include Damaged wiring or connectors in the rear mode control motor circuit, Faulty rear mode control motor, Issues with the HVAC control module.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 08, 2024
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Code B1222 Description

The B1222 diagnostic trouble code (DTC) indicates a short in the rear mode control motor circuit. This code is typically found in vehicles equipped with automatic climate control systems. The rear mode control motor is responsible for adjusting the airflow direction to the rear HVAC (heating, ventilation, and air conditioning) system. A short in this circuit can disrupt the operation of the rear mode control motor, leading to issues with the distribution of air to the rear vents.

OBDII Code B1222 - Short In The Rear Mode Control Motor Circuit
B1222 Code - Short In The Rear Mode Control Motor Circuit

Common Causes of B1222

  1. Damaged wiring or connectors in the rear mode control motor circuit
  2. Faulty rear mode control motor
  3. Issues with the HVAC control module
  4. Electrical problems within the climate control system
  5. Water damage or corrosion in the rear HVAC components

Symptoms of B1222

  1. Lack of airflow to the rear vents
  2. Inability to adjust airflow direction in the rear HVAC system
  3. Erratic operation of the rear mode control motor
  4. Rear HVAC system only blowing hot or cold air

How to Fix B1222

  1. Begin by inspecting the wiring and connectors in the rear mode control motor circuit for any signs of damage or corrosion. Repair or replace any faulty components as needed.
  2. Test the rear mode control motor to determine if it is functioning correctly. Replace the motor if it is found to be faulty.
  3. Check the HVAC control module for any issues and replace if necessary.
  4. Clear the DTC from the vehicle's onboard computer using a diagnostic scan tool.
  5. Test the rear HVAC system to ensure that the airflow direction can be adjusted properly to the rear vents.

Cost to Fix B1222

The cost of repairing a short in the rear mode control motor circuit can vary depending on the specific cause of the issue and the extent of the damage. On average, the repair costs for this type of issue can range from $150 to $400, including parts and labor. However, it's important to note that labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate. Additionally, the cost of any replacement parts needed for the repair will also contribute to the overall cost.

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Code B1222 Information for Specific Makes

  • B1222 Acura — Short In The Rear Mode Control Motor Circuit
  • B1222 Chrysler — Right Heated Seat LO Indicator Control Circuit High
  • B1222 Dodge — Right Heated Seat LO Indicator Control Circuit High
  • B1222 Honda — Short In The Rear Mode Control Motor Circuit
  • B1222 Jeep — Right Heated Seat LO Indicator Control Circuit High
  • B1222 RAM — Right Heated Seat LO Indicator Control Circuit High
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 B1222 Code

1. What are the common symptoms of OBDII code B1222 (Short In The Rear Mode Control Motor Circuit)?

The common symptoms include issues with the rear mode control motor not functioning properly, leading to difficulties in adjusting the airflow direction in the vehicle's HVAC system.

2. What are the possible causes of OBDII code B1222?

Possible causes of this code include a short circuit in the wiring connected to the rear mode control motor, a faulty rear mode control motor, or issues with the HVAC control module.

3. How can I diagnose the OBDII code B1222?

Diagnosing this code typically involves using a scan tool to retrieve the fault codes, inspecting the wiring and connectors related to the rear mode control motor, and testing the functionality of the motor itself.

4. Can I still drive my vehicle with OBDII code B1222 present?

While it may be possible to drive the vehicle with this code present, it is recommended to address the issue promptly to avoid further HVAC system malfunctions and potential discomfort while driving.

5. How can I repair OBDII code B1222?

Repairing this code often involves fixing any short circuits in the wiring, replacing the rear mode control motor if necessary, and resetting the fault codes using a scan tool.

6. Is it safe to reset the OBDII code B1222 without addressing the underlying issue?

It is not recommended to simply reset the code without addressing the root cause, as the problem will likely reoccur, leading to continued HVAC system issues.

7. Can extreme weather conditions impact the occurrence of OBDII code B1222?

Extreme weather conditions can potentially exacerbate issues related to the rear mode control motor and wiring, leading to the triggering of this OBDII code.

8. Are there any preventive maintenance tips to avoid OBDII code B1222?

Regularly checking and maintaining the HVAC system components, including the rear mode control motor and associated wiring, can help prevent the occurrence of this code.

9. How long does it typically take to repair OBDII code B1222?

The repair time for this code can vary depending on the specific cause of the issue, but it usually takes anywhere from 1 to 3 hours to diagnose and fix the problem.

10. Can a DIY enthusiast with basic automotive knowledge repair OBDII code B1222?

While some DIY enthusiasts may be able to address this code, it is recommended to consult a professional mechanic for an accurate diagnosis and proper repair to ensure the issue is resolved effectively.

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