AutoCodes – Generic – B1344

B1344 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 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 6,821

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

What does this mean?

What are the Possible Causes of the DTC B1344?

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?

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 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.

Need more information about the B1344 code?

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Need Help with the Code?

Get the B1344 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B1344 Buick — Mode Actuator
B1344 Cadillac — Mode Actuator
B1344 Chevrolet — Mode Actuator
B1344 GMC — Mode Actuator
B1344 Infiniti — Front Door Satellite Sensor Left Malfunction
B1344 Nissan — Front Door Satellite Sensor Left Malfunction
B1344 Saturn — Mode 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 B1344 Code

1. What are the common symptoms of OBDII code B1344 related to the Mode Actuator?

- Common symptoms include inconsistent air distribution from the HVAC system, the inability to change air output modes, or unusual noises coming from the dashboard area.

2. What are the potential causes of OBDII code B1344 related to the Mode Actuator?

- The code may be triggered by a faulty mode actuator, a problem with the HVAC control module, a wiring issue, or a calibration error within the system.

3. How can I diagnose the underlying issue causing OBDII code B1344 related to the Mode Actuator?

- Diagnosis usually involves using a scan tool to retrieve the specific code, checking the mode actuator for proper operation, inspecting the wiring for damage, and verifying the HVAC control module's functionality.

4. Is it safe to continue driving with OBDII code B1344 related to the Mode Actuator?

- While the vehicle may still be operable, it's advisable to address the issue promptly to avoid potential discomfort and further damage to the HVAC system.

5. Can I reset OBDII code B1344 related to the Mode Actuator without fixing the underlying problem?

- Resetting the code without addressing the root cause is not recommended, as the issue will likely reoccur, and the symptoms may persist.

6. Are there any DIY repair tips for fixing OBDII code B1344 related to the Mode Actuator?

- DIY repair options may include checking and reconnecting any loose or damaged wiring, recalibrating the HVAC system if possible, or replacing the mode actuator if it's found to be defective.

7. How much does it typically cost to repair OBDII code B1344 related to the Mode Actuator?

- The cost of repairs can vary depending on the exact cause of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

8. Can a malfunctioning mode actuator cause other problems in the vehicle?

- Yes, a malfunctioning mode actuator can impact the overall functionality of the HVAC system, leading to discomfort for passengers and potentially affecting the vehicle's climate control performance.

9. Are there any preventive measures to avoid OBDII code B1344 related to the Mode Actuator in the future?

- Regularly servicing the HVAC system, addressing any unusual noises or issues promptly, and keeping the system well-maintained can help prevent the occurrence of code B1344 related to the Mode Actuator.

10. How long does it usually take to repair OBDII code B1344 related to the Mode Actuator?

- The repair time can vary depending on the specific issue and the availability of parts, but it generally takes a few hours to half a day for a professional mechanic to diagnose and repair the problem.