AutoCodes – Chevrolet – P0533 Chevrolet

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

Quick Answer

The Engine Control Module (ECM) monitors the high side refrigerant pressure through the A/C Refrigerant Pressure Sensor. Common causes include A/C system low or overcharged with refrigerant, Cooling fans are inoperative, Faulty A/C Refrigerant 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: P0533 Chevrolet indicates A/C Refrigerant Pressure Sensor Circuit High Input.
Common causes: Common causes include A/C system low or overcharged with refrigerant, Cooling fans are inoperative, Faulty A/C Refrigerant 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 14,072

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 Jul 02, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P0533 Chevrolet Description

The Engine Control Module (ECM) monitors the high side refrigerant pressure through the A/C Refrigerant Pressure Sensor. The ECM supplies a 5 V reference and a low reference to the sensor. Changes in the A/C refrigerant pressure cause the sensor signal to the ECM to vary. When the pressure is high, the signal voltage is high. When the pressure is low, the signal voltage is low. The ECM may use this information to turn the cooling fans on as well as to monitor clutch engagement. The HVAC module will receive the A/C refrigerant pressure information from the ECM via serial data. The Diagnostic Trouble Code (DTC) will be set when the ECM detects that the A/C pressure is more than 428 psi (4.92 V).

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

What does this mean?

What are the Possible Causes of the DTC P0533 Chevrolet?

A/C system low or overcharged with refrigerant
Cooling fans are inoperative
Faulty A/C Refrigerant Pressure Sensor
A/C Refrigerant Pressure Sensor circuit open or shorted
A/C Refrigerant Pressure Sensor circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P0533 Chevrolet?

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 Chevrolet 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 Chevrolet code?

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Information for Specific Chevrolet Models

P0533 2014 Chevrolet Silverado — A/C Refrigerant Pressure Sensor Circuit High Input
P0533 2015 Chevrolet Silverado — A/C Refrigerant Pressure Sensor Circuit High Input
P0533 2016 Chevrolet Silverado — A/C Refrigerant Pressure Sensor Circuit High Input
P0533 2017 Chevrolet Silverado — A/C Refrigerant Pressure Sensor Circuit High Input
P0533 2018 Chevrolet Silverado — A/C Refrigerant Pressure Sensor Circuit High Input

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.