AutoCodes – GMC – P1544 GMC

P1544 GMC Code - A/C Refrigerant Condition Very Low

Quick Answer

P1544 GMC indicates A/C Refrigerant Condition Very Low. Common causes include Faulty A/C System, A/C System harness is open or shorted, A/C System circuit poor electrical connection. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means: P1544 GMC indicates A/C Refrigerant Condition Very Low.
Common causes: Common causes include Faulty A/C System, A/C System harness is open or shorted, A/C System circuit poor electrical connection.
Severity: Low - monitor the vehicle and repair when practical.
Can I drive?: The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

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Code Popularity 3,107

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 29, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1544 GMC Description

OBDII Code P1544 GMC - A/C Refrigerant Condition Very Low - AutoCodes.com — P1544 GMC Code - A/C Refrigerant Condition Very Low

What does this mean?

What are the Possible Causes of the DTC P1544 GMC?

Faulty A/C System
A/C System harness is open or shorted
A/C System circuit poor electrical connection

How to Fix the DTC P1544 GMC?

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 P1544 GMC 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 P1544 GMC code?

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Need Help with the Code?

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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 P1544 GMC Code

Q1: What does the OBDII code P1544 on a GMC vehicle mean?

**A1:** Code P1544 indicates that the A/C refrigerant condition is very low, which can affect the performance of the air conditioning system.

Q2: What are common symptoms of code P1544 in a GMC vehicle?

**A2:** Symptoms include poor or no cooling from the A/C system, the A/C compressor failing to engage, and possible warning lights or error messages related to the air conditioning system.

Q3: What causes the P1544 code to appear in a GMC vehicle?

**A3:** Common causes include low refrigerant levels due to leaks, a faulty pressure sensor, or issues with the A/C system wiring or connectors.

Q4: How can I check for refrigerant leaks when troubleshooting code P1544?

**A4:** Use a UV dye or electronic leak detector to inspect the A/C system components, such as hoses, connections, and the condenser, for leaks.

Q5: Can the P1544 code affect other vehicle systems?

**A5:** While it primarily affects the A/C system, prolonged issues with refrigerant levels can lead to compressor damage or reduced engine performance due to added strain.

Q6: How do I fix the P1544 code on my GMC vehicle?

**A6:** Repairs may involve fixing or replacing leaking components, refilling refrigerant to the correct level, or replacing a faulty A/C pressure sensor.

Q7: Should I clear the P1544 code after refilling refrigerant?

**A7:** Yes, after refilling refrigerant or making repairs, clear the code with an OBDII scanner and monitor the system to ensure the issue doesnâ€™t recur.

Q8: Is driving with the P1544 code safe?

**A8:** Driving is generally safe, but the A/C system will not function properly, and ignoring the issue could lead to further damage to the compressor or related components.

Q9: How can I prevent the P1544 code from occurring in the future?

**A9:** Regularly inspect and maintain the A/C system, check refrigerant levels, and promptly repair any leaks or component damage.

Q10: Can a faulty A/C pressure sensor trigger the P1544 code?

**A10:** Yes, if the sensor is malfunctioning, it may incorrectly detect low refrigerant pressure and trigger the code even if the system is properly charged.