AutoCodes – Generic – B1343

B1343 Code - Recirculation Actuator

Quick Answer

The Instrument Panel Module (IPM) controls the HVAC door actuators to regulate the airflow through the Heating, Ventilation, and Air Conditioning (HVAC) system. Common causes include Faulty Recirculation Actuator, Recirculation Actuator harness is open or shorted, Recirculation Actuator 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: B1343 indicates Recirculation Actuator.
Common causes: Common causes include Faulty Recirculation Actuator, Recirculation Actuator harness is open or shorted, Recirculation Actuator 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 9,038

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 Mar 14, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1343 Description

The Instrument Panel Module (IPM) controls the HVAC door actuators to regulate the airflow through the Heating, Ventilation, and Air Conditioning (HVAC) system. Each actuator is a 5-wire bi-directional electric motor that incorporates a feedback potentiometer. Ignition 3 voltage, low reference, control, 5-volt reference and position signal circuits enable the actuator to operate. The control circuit uses either a 0, 2.5, or 5-volt signal to command the actuator movement. When the actuator is at rest, the control circuit value is 2.5 volts. A 0 or 5-volt control signal commands the actuator movement in opposite directions. When the actuator shaft rotates, the potentiometer's adjustable contact changes the door position signal between 0-5 volts. The IPM converts the voltage values to count values where one volt is approximately equal to 51 counts. The IPM uses a range of 0-255 counts to index the actuator position. The door position signal voltage is converted to a 0-255 count range. When the module sets a commanded, or targeted value, the control signal is changed to either 0 or 5 volts depending upon the direction that the actuator needs to rotate to reach the commanded value. As the actuator shaft rotates the changing position signal is sent to the module. Once the position signal and the commanded value are the same, the module changes the control signal to 2.5 volts.

OBDII Code B1343 - Recirculation Actuator - AutoCodes.com — B1343 Code - Recirculation Actuator

What does this mean?

What are the Possible Causes of the DTC B1343?

Faulty Recirculation Actuator
Recirculation Actuator harness is open or shorted
Recirculation Actuator circuit poor electrical connection
Faulty Instrument Panel Module (IPM)

How to Fix the DTC B1343?

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 B1343 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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Need Help with the Code?

Get the B1343 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B1343 Buick — Recirculation Actuator
B1343 Cadillac — Recirculation Actuator
B1343 Chevrolet — Recirculation Actuator
B1343 GMC — Recirculation Actuator
B1343 Infiniti — Front Door Satellite Sensor Left Malfunction
B1343 Nissan — Front Door Satellite Sensor Left Malfunction
B1343 Pontiac — Recirculation Actuator
B1343 Saturn — Recirculation Actuator

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 B1343 Code

1. What are common symptoms of OBDII code B1343 (Recirculation Actuator)?

The common symptoms of OBDII code B1343 include inconsistent air conditioning performance, abnormal noises coming from the HVAC system, and the inability to control air distribution in the vehicle.

2. What causes OBDII code B1343 (Recirculation Actuator) to trigger?

OBDII code B1343 is triggered when the recirculation actuator in the HVAC system malfunctions. This can be due to a faulty actuator motor, damaged wiring, or a problem with the actuator itself.

3. How can I diagnose OBDII code B1343 (Recirculation Actuator) at home?

To diagnose OBDII code B1343, you can use an OBDII scanner to retrieve the specific code. You can also manually inspect the recirculation actuator and its components for any visible damage or signs of malfunction.

4. Can I continue driving with OBDII code B1343 (Recirculation Actuator) present?

It is not recommended to continue driving with OBDII code B1343 present, as it can affect the overall performance of the HVAC system in your vehicle. It is advisable to address the issue promptly to avoid further damage.

5. How can I repair OBDII code B1343 (Recirculation Actuator)?

Repairing OBDII code B1343 involves replacing the faulty recirculation actuator or addressing any wiring issues related to the actuator. It is recommended to consult a professional mechanic for proper diagnosis and repair.

6. Are there any temporary fixes for OBDII code B1343 (Recirculation Actuator)?

Temporary fixes such as manually adjusting the air distribution settings or resetting the HVAC system may provide short-term relief for OBDII code B1343. However, it is important to address the root cause of the issue for a permanent solution.

7. How much does it cost to fix OBDII code B1343 (Recirculation Actuator)?

The cost of fixing OBDII code B1343 can vary depending on the extent of the damage and the specific components that need to be replaced. It is advisable to obtain quotes from different mechanics to compare prices.

8. Can OBDII code B1343 (Recirculation Actuator) cause other issues in my vehicle?

While OBDII code B1343 specifically relates to the recirculation actuator, a malfunctioning HVAC system can impact overall comfort and air quality inside the vehicle. Addressing the issue promptly can prevent further complications.

9. How long does it take to repair OBDII code B1343 (Recirculation Actuator)?

The repair time for OBDII code B1343 can vary depending on the accessibility of the recirculation actuator and the complexity of the repair. In general, it may take a few hours to half a day to complete the repair.

10. Is it possible to prevent OBDII code B1343 (Recirculation Actuator) from occurring?

Regular maintenance of the HVAC system, such as inspecting and cleaning the recirculation actuator, can help prevent OBDII code B1343 from occurring. Timely repairs of any minor issues can also help avoid triggering the code.