AutoCodes – Buick – B1343 Buick

B1343 Buick 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 Buick 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 1,529

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

What does this mean?

What are the Possible Causes of the DTC B1343 Buick?

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 Buick?

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 Buick 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 B1343 Buick Code

1. What is OBDII code B1343 in a Buick related to the Recirculation Actuator?

- OBDII code B1343 in a Buick refers to a problem with the Recirculation Actuator, which controls the airflow inside the vehicle.

2. What are common symptoms of a faulty Recirculation Actuator?

- Common symptoms of a faulty Recirculation Actuator include inconsistent air conditioning performance, unusual noises coming from the HVAC system, and an inability to switch between fresh and recirculated air.

3. What are possible causes of OBDII code B1343 related to the Recirculation Actuator?

- Possible causes of OBDII code B1343 related to the Recirculation Actuator include a malfunctioning actuator motor, wiring issues, or a faulty control module.

4. How can I diagnose a Recirculation Actuator issue in my Buick?

- To diagnose a Recirculation Actuator issue in your Buick, you can use an OBDII scanner to retrieve the specific trouble code, visually inspect the actuator for any physical damage, and test the actuator's functionality using a multimeter.

5. Can I repair a Recirculation Actuator problem myself?

- Repairing a Recirculation Actuator problem yourself may be possible depending on your mechanical skills. You can replace the actuator, check and repair any damaged wiring, or reset the HVAC system to see if the issue resolves.

6. Are there any quick fixes for OBDII code B1343 related to the Recirculation Actuator?

- In some cases, performing a system reset by disconnecting the car battery for a few minutes may temporarily resolve the OBDII code B1343 related to the Recirculation Actuator. However, it's important to address the root cause for a permanent fix.

7. How much does it cost to replace a faulty Recirculation Actuator in a Buick?

- The cost of replacing a faulty Recirculation Actuator in a Buick can vary based on the model year and labor rates. Generally, the part itself can range from $50 to $200, with additional costs for labor if done at a dealership or auto repair shop.

8. Can a faulty Recirculation Actuator affect the overall performance of my Buick?

- Yes, a faulty Recirculation Actuator can impact the overall performance of your Buick's HVAC system, leading to inconsistent temperature control, poor air quality, and decreased comfort while driving.

9. Will driving with OBDII code B1343 cause further damage to my Buick?

- Driving with OBDII code B1343 related to the Recirculation Actuator may not cause immediate damage to your Buick, but it's recommended to address the issue promptly to prevent potential long-term problems with the HVAC system.

10. How long does it typically take to repair a Recirculation Actuator issue in a Buick?

- The time it takes to repair a Recirculation Actuator issue in a Buick can vary depending on the exact problem and your experience level. Generally, it can take anywhere from 1 to 3 hours for a professional mechanic to diagnose and fix the issue.