AutoCodes – Chevrolet – B1344 Chevrolet

B1344 Chevrolet Code - Mode 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 Mode Actuator, Mode Actuator harness is open or shorted, Mode 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: B1344 Chevrolet indicates Mode Actuator.
Common causes: Common causes include Faulty Mode Actuator, Mode Actuator harness is open or shorted, Mode 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 946

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 B1344 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 B1344 Chevrolet - Mode Actuator - AutoCodes.com — B1344 Chevrolet Code - Mode Actuator

What does this mean?

What are the Possible Causes of the DTC B1344 Chevrolet?

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

How to Fix the DTC B1344 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 B1344 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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Get the B1344 Chevrolet 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 B1344 Chevrolet Code

1. What is OBDII code B1344 for a Chevrolet, related to the Mode Actuator?

The B1344 code indicates a problem with the Mode Actuator in the HVAC system of a Chevrolet vehicle.

2. What are some common symptoms of a Mode Actuator issue triggering code B1344?

Symptoms may include inconsistent or incorrect air distribution from the HVAC vents, unusual noises coming from the dash area, or the inability to control the mode selection (e.g., defrost, floor, vents).

3. What are possible causes of OBDII code B1344 in a Chevrolet related to the Mode Actuator?

Common causes may include a faulty mode actuator, damaged wiring or connectors, a blown fuse, or a malfunctioning HVAC control module.

4. How can I diagnose a B1344 code in my Chevrolet for the Mode Actuator issue?

Diagnosis typically involves using a scan tool to retrieve the specific trouble code, checking the Mode Actuator for proper operation, inspecting related wiring and connectors, and testing the HVAC control module.

5. Can I drive my Chevrolet with OBDII code B1344 related to the Mode Actuator issue?

It is generally safe to drive the vehicle with this code, but it's advisable to address the issue promptly to avoid potential discomfort due to HVAC system malfunctions.

6. How can I repair a B1344 code in my Chevrolet caused by a faulty Mode Actuator?

Repair may involve replacing the defective Mode Actuator with a new one, ensuring proper installation and calibration to restore correct HVAC system functionality.

7. Are there any DIY tips for troubleshooting a B1344 code in a Chevrolet related to the Mode Actuator?

DIY enthusiasts can start by checking fuses related to the HVAC system, inspecting the Mode Actuator for physical damage or obstructions, and verifying proper electrical connections.

8. How much does it typically cost to repair a B1344 code in a Chevrolet due to a Mode Actuator issue?

Costs can vary based on the specific model of the Chevrolet, the labor rates of the repair shop, and whether genuine OEM parts or aftermarket components are used. It's recommended to obtain quotes from multiple sources.

9. Can a B1344 code related to the Mode Actuator be a recurring issue in a Chevrolet?

If the root cause of the problem, such as electrical issues or improper installation, is not addressed during the repair, there is a possibility of the code reoccurring.

10. Is it necessary to reset the OBDII system after repairing a B1344 code in a Chevrolet for the Mode Actuator issue?

After completing the repair, it's recommended to clear the trouble codes using a scan tool to reset the OBDII system and ensure that the issue has been properly resolved.