AutoCodes – Saturn – B1343 Saturn

B1343 Saturn 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 Saturn 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 899

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

What does this mean?

What are the Possible Causes of the DTC B1343 Saturn?

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 Saturn?

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 Saturn 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 more information on how to fix the B1343 Saturn code? Get Access to Factory Service Manuals

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Get the B1343 Saturn 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 B1343 Saturn Code

1. What does OBDII code B1343 mean on a Saturn?

B1343 indicates an issue with the recirculation actuator, which controls the flow of outside or recirculated air into the HVAC system.

2. What are the common symptoms of code B1343 on a Saturn?

Symptoms may include difficulty changing air circulation modes, unusual noises from the HVAC system, or inconsistent airflow.

3. What causes the B1343 recirculation actuator code to appear?

The code can be triggered by a faulty recirculation actuator, wiring issues, a blown fuse, or a malfunctioning HVAC control module.

4. Can I drive my Saturn with the B1343 code?

Yes, but the HVAC system may not function properly, leading to discomfort or reduced air quality in the cabin.

5. How can I diagnose the B1343 code on a Saturn?

Start by scanning for codes using an OBDII scanner, inspecting the recirculation actuator for damage, and checking the wiring and connectors for loose or corroded connections.

6. How do I fix the B1343 code on my Saturn?

Repairs may involve replacing the faulty recirculation actuator, repairing damaged wiring, or resetting the HVAC control module.

7. How much does it cost to fix the B1343 recirculation actuator code?

Repair costs vary but typically range from $150 to $300, depending on whether the actuator needs replacement and labor costs.

8. Can a B1343 code be caused by a software issue?

While rare, faulty programming in the HVAC control module could trigger the code and may require a module update or reset.

9. What tools do I need to repair a B1343 code on a Saturn?

Youâ€™ll need an OBDII scanner, basic hand tools, and possibly a multimeter to test electrical connections.

10. How can I prevent the B1343 code from recurring?

Regularly maintain the HVAC system, keep electrical connections clean, and ensure the actuator is not obstructed by debris.

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