AutoCodes – Mercedes-Benz – P2524 Mercedes-Benz

P2524 Mercedes-Benz Code - A/C Request 'B' Circuit High

Quick Answer

The Powertrain Control Module (PCM) monitors the refrigerant pressure through the Air Condition (A/C) Pressure Sensor. Common causes include Low refrigerant, Too much refrigerant, Faulty Low Side Pressure Sensor. 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: P2524 Mercedes-Benz indicates A/C Request 'B' Circuit High.
Common causes: Common causes include Low refrigerant, Too much refrigerant, Faulty Low Side Pressure Sensor.
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 1,869

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 Jan 17, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2524 Mercedes-Benz Description

The Powertrain Control Module (PCM) monitors the refrigerant pressure through the Air Condition (A/C) Pressure Sensor. The PCM supplies a 5V reference and a low reference to the sensor. Changes in the A/C refrigerant pressure causes the sensor signal to the PCM to vary. When the pressure is high, the signal is high. When the pressure is low, the signal is low. The PCM sets the OBII code when the signal from the sensor is out of factory specifications.

OBDII Code P2524 Mercedes-Benz - A/C Request 'B' Circuit High - AutoCodes.com — P2524 Mercedes-Benz Code - A/C Request 'B' Circuit High

What does this mean?

What are the Possible Causes of the DTC P2524 Mercedes-Benz?

Low refrigerant
Too much refrigerant
Faulty Low Side Pressure Sensor
Low Side Pressure Sensor harness is open or shorted
Low Side Pressure Sensor circuit poor electrical connection

How to Fix the DTC P2524 Mercedes-Benz?

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 P2524 Mercedes-Benz 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 P2524 Mercedes-Benz code?

Need more information on how to fix the P2524 Mercedes-Benz code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2524 Mercedes-Benz 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 P2524 Mercedes-Benz Code

1. What are the common symptoms of OBDII code P2524 in a Mercedes-Benz related to the A/C Request 'B' Circuit High?

- Common symptoms may include the air conditioning system not working properly, the A/C compressor not engaging, and the A/C not providing cold air.

2. What could cause the A/C Request 'B' Circuit High OBDII code P2524 in a Mercedes-Benz?

- Possible causes include a faulty A/C pressure sensor, a malfunctioning A/C control module, wiring issues, or a problem with the A/C compressor clutch.

3. How can I diagnose the A/C Request 'B' Circuit High code P2524 in my Mercedes-Benz?

- Diagnosis typically involves using a scan tool to retrieve the trouble codes, checking the A/C system components for any visible damage, and testing the A/C pressure sensor and control module.

4. Can driving with the P2524 code present cause any damage to my Mercedes-Benz?

- Driving with this code may lead to discomfort due to the A/C not functioning properly, but it should not cause any immediate damage to the vehicle.

5. What are some repair tips for fixing the A/C Request 'B' Circuit High code P2524 in a Mercedes-Benz?

- Repair tips may include checking and repairing any damaged wiring, replacing the faulty A/C pressure sensor or control module, and ensuring proper connection of the A/C compressor clutch.

6. Is it safe to continue driving my Mercedes-Benz with the A/C Request 'B' Circuit High code P2524 unresolved?

- While it may not cause immediate harm to the vehicle, it is recommended to address the issue promptly to ensure the proper functioning of the A/C system and overall comfort while driving.

7. How much does it typically cost to repair the A/C Request 'B' Circuit High code P2524 in a Mercedes-Benz?

- Repair costs can vary depending on the specific cause of the issue, but they may range from a few hundred to over a thousand dollars, including parts and labor.

8. Can a DIY enthusiast fix the A/C Request 'B' Circuit High code P2524 issue in a Mercedes-Benz?

- Depending on the root cause and the individual's skill level, some DIY enthusiasts may be able to address the problem by following repair guides and using the necessary tools.

9. Are there any preventative measures to avoid the A/C Request 'B' Circuit High code P2524 in a Mercedes-Benz?

- Regular maintenance of the A/C system, checking for any signs of wear or damage, and addressing any issues promptly can help prevent the occurrence of this trouble code.

10. How long does it typically take to repair the A/C Request 'B' Circuit High code P2524 in a Mercedes-Benz?

- Repair times can vary based on the complexity of the issue and the availability of parts, but it may take a few hours to a full day for a professional technician to diagnose and fix the problem.