AutoCodes – Mercedes-Benz – P0533 Mercedes-Benz

P0533 Mercedes-Benz Code - A/C Refrigerant Pressure Sensor Circuit High Input

Quick Answer

The Powertrain Control Module (PCM) monitors the high side refrigerant pressure via a A/C refrigerant pressure sensor. Common causes include A/C system low or over charge with refrigerant, Faulty A/C refrigerant pressure sensor, Cooling fans in-operative. 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: P0533 Mercedes-Benz indicates A/C Refrigerant Pressure Sensor Circuit High Input.
Common causes: Common causes include A/C system low or over charge with refrigerant, Faulty A/C refrigerant pressure sensor, Cooling fans in-operative.
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 8,600

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 Jun 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0533 Mercedes-Benz Description

The Powertrain Control Module (PCM) monitors the high side refrigerant pressure via a A/C refrigerant pressure sensor. When the pressure is high the signal voltage is high. When the pressure is low the signal voltage is low. When pressure is high the PCM commands the cooling fans on. When pressure is too high or too low the PCM will not allow the A/C compressor clutch to engage.

OBDII Code P0533 Mercedes-Benz - A/C Refrigerant Pressure Sensor Circuit High Input - AutoCodes.com — P0533 Mercedes-Benz Code - A/C Refrigerant Pressure Sensor Circuit High Input

What does this mean?

What are the Possible Causes of the DTC P0533 Mercedes-Benz?

A/C system low or over charge with refrigerant
Faulty A/C refrigerant pressure sensor
Cooling fans in-operative
A/C refrigerant pressure sensor circuit open or shorted
A/C refrigerant pressure sensor circuit poor electrical connection

How to Fix the DTC P0533 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 P0533 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 P0533 Mercedes-Benz code?

Need more information on how to fix the P0533 Mercedes-Benz code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0533 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 P0533 Mercedes-Benz Code

1. What are the common symptoms of OBDII code P0533 in a Mercedes-Benz related to the A/C Refrigerant Pressure Sensor Circuit High Input?

- Common symptoms include the air conditioning system not cooling properly, erratic A/C operation, and potential illumination of the Check Engine Light.

2. What are some possible causes of OBDII code P0533 in a Mercedes-Benz?

- Possible causes include a faulty A/C refrigerant pressure sensor, damaged wiring or connectors in the sensor circuit, or issues with the A/C control module.

3. How can I diagnose the A/C Refrigerant Pressure Sensor Circuit High Input issue in my Mercedes-Benz?

- Diagnose by using a scan tool to read the OBDII codes, checking the A/C refrigerant pressure sensor for proper operation, and inspecting the sensor wiring and connectors for any damage.

4. Can I continue driving my Mercedes-Benz with OBDII code P0533 triggered?

- It is not recommended to continue driving with this code, as it can lead to further A/C system malfunctions and potential damage if left unresolved.

5. How can I reset the OBDII code P0533 in my Mercedes-Benz after repairs have been made?

- Use a scan tool to clear the code or disconnect the vehicle's battery for a few minutes to reset the Check Engine Light.

6. Are there any DIY repair tips for fixing the A/C Refrigerant Pressure Sensor Circuit High Input issue in a Mercedes-Benz?

- DIY repair tips may include checking and cleaning sensor connectors, ensuring proper sensor installation, and following the manufacturer's diagnostic procedures.

7. What should I do if I suspect the A/C refrigerant pressure sensor is faulty in my Mercedes-Benz?

- If you suspect a faulty sensor, it is recommended to have it tested by a professional technician to accurately diagnose and replace the sensor if necessary.

8. How much does it typically cost to repair OBDII code P0533 in a Mercedes-Benz at a dealership or auto repair shop?

- Repair costs can vary depending on the exact cause of the issue, but it may range from $100 to $300 for parts and labor at a dealership or auto repair shop.

9. Can extreme weather conditions affect the triggering of OBDII code P0533 in a Mercedes-Benz?

- Extreme weather conditions, such as very high or low temperatures, can potentially impact the A/C system and trigger the A/C Refrigerant Pressure Sensor Circuit High Input code.

10. Is it possible for OBDII code P0533 in a Mercedes-Benz to be a false alarm?

- While rare, false alarms can occur with any diagnostic trouble code, so it's recommended to have a professional technician verify the issue to ensure accuracy.