AutoCodes – Mercedes-Benz – P2517 Mercedes-Benz

P2517 Mercedes-Benz Code - Air Condition Refrigerant Pressure Sensor 'B' Circuit Low

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: P2517 Mercedes-Benz indicates Air Condition Refrigerant Pressure Sensor 'B' Circuit Low.
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 1,766

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
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P2517 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 P2517 Mercedes-Benz - Air Condition Refrigerant Pressure Sensor 'B' Circuit Low - AutoCodes.com — P2517 Mercedes-Benz Code - Air Condition Refrigerant Pressure Sensor 'B' Circuit Low

What does this mean?

What are the Possible Causes of the DTC P2517 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 P2517 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 does this mean?

Code Tech Notes

Do not just add more refrigerant, use an A/C machine to evacuate the refrigerant and charge the correct amount.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2517 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 P2517 Mercedes-Benz code?

Need more information on how to fix the P2517 Mercedes-Benz code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2517 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 P2517 Mercedes-Benz Code

1. What are the common symptoms of OBDII code P2517 in a Mercedes-Benz related to the Air Condition Refrigerant Pressure Sensor 'B' Circuit Low?

The common symptoms include a malfunctioning air conditioning system, reduced cooling performance, and possible activation of the A/C compressor protection mode.

2. What are the potential causes of OBDII code P2517 in a Mercedes-Benz?

The code P2517 can be triggered by issues such as a faulty refrigerant pressure sensor, damaged wiring or connectors in the sensor circuit, low refrigerant levels, or a malfunctioning A/C compressor.

3. How can I diagnose the cause of OBDII code P2517 in my Mercedes-Benz?

Diagnosing the code involves using an OBDII scanner to read the code and checking the refrigerant pressure sensor, wiring, connectors, and A/C system components for any visible damage or defects.

4. Can I continue driving my Mercedes-Benz with OBDII code P2517 present?

It is not recommended to drive with the code P2517 active, as it can lead to further damage to the air conditioning system and potentially affect the overall performance of the vehicle.

5. How can I repair OBDII code P2517 in my Mercedes-Benz?

Repairing the code typically involves replacing the faulty refrigerant pressure sensor, repairing or replacing damaged wiring and connectors, ensuring proper refrigerant levels, and checking the A/C compressor for any issues.

6. Will resetting the OBDII code P2517 in my Mercedes-Benz make it go away permanently?

Resetting the code without addressing the underlying issue will not make it go away permanently. It is important to diagnose and repair the root cause to prevent the code from reoccurring.

7. Is it possible to prevent OBDII code P2517 from appearing in my Mercedes-Benz?

Regular maintenance of the air conditioning system, checking refrigerant levels, and addressing any issues promptly can help prevent the occurrence of code P2517 in your Mercedes-Benz.

8. Can a DIY enthusiast fix OBDII code P2517 in a Mercedes-Benz?

While some DIY enthusiasts may have the skills to address issues related to code P2517, it is recommended to consult a professional mechanic or technician for proper diagnosis and repair to ensure the problem is fixed correctly.

9. How long does it typically take to repair OBDII code P2517 in a Mercedes-Benz?

The time needed to repair the code P2517 can vary depending on the exact cause of the issue, but it may take a few hours to a full day for a mechanic to diagnose and fix the problem.

10. Is OBDII code P2517 a common issue in Mercedes-Benz vehicles?

While it may not be as common as some other OBDII codes, issues related to the Air Condition Refrigerant Pressure Sensor 'B' Circuit Low, triggering code P2517, can occur in Mercedes-Benz vehicles, especially as they age or experience wear and tear.