AutoCodes – Chevrolet – B1343 Chevrolet

B1343 Chevrolet 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 Chevrolet 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 1,073

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

What does this mean?

What are the Possible Causes of the DTC B1343 Chevrolet?

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 Chevrolet?

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 Chevrolet 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 Chevrolet Code

1. What does OBDII code B1343 for a Chevrolet Recirculation Actuator indicate?

- OBDII code B1343 specifically points to an issue with the Recirculation Actuator in a Chevrolet vehicle.

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

- Common symptoms include inconsistent air distribution, unusual noises coming from the HVAC system, or the inability to switch between fresh air and recirculated air modes.

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

- Causes can range from a malfunctioning actuator motor, damaged wiring, a faulty control module, or issues with the HVAC system itself.

4. How can I diagnose the issue with the Recirculation Actuator triggering code B1343?

- Diagnosis typically involves using an OBDII scanner to retrieve the specific code, followed by inspecting the actuator, checking for proper electrical connections, and testing the HVAC system's functionality.

5. Can I repair a Recirculation Actuator problem triggering code B1343 on my own?

- Depending on your skills and experience, you may be able to replace the actuator or address wiring issues yourself. However, for complex problems or integrated system failures, professional assistance is recommended.

6. Are there any quick fixes or temporary solutions for a Recirculation Actuator issue?

- Sometimes, resetting the HVAC system by disconnecting the battery for a few minutes can temporarily clear the code. However, this may not address the underlying problem and could result in the code reappearing.

7. How important is it to address OBDII code B1343 related to the Recirculation Actuator?

- While the vehicle may still operate, ignoring the issue can lead to discomfort, reduced HVAC performance, and potential long-term damage to the system. It's best to address the problem promptly.

8. Can a faulty Recirculation Actuator triggering code B1343 affect other components of the vehicle?

- Yes, since the HVAC system is interconnected with various vehicle systems, a malfunctioning Recirculation Actuator can impact overall climate control performance and potentially affect other related components.

9. What are the typical repair costs associated with fixing a Recirculation Actuator issue triggering code B1343?

- Repair costs can vary based on the specific problem, parts needed, and labor rates. However, expect to pay anywhere from $100 to $500 for parts and labor, depending on the complexity of the repair.

10. How can I prevent future occurrences of OBDII code B1343 related to the Recirculation Actuator?

- Routine HVAC system maintenance, checking for unusual sounds or air distribution issues, and addressing any problems promptly can help prevent the reoccurrence of code B1343.