P0531 - A/C Refrigerant Pressure Sensor Circuit Range/Performance

Repair Importance Level: 1/3
Repair Difficulty Level: 3/3    What is this?
Table of contents

P0531 Possible Causes

  • 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 do I fix code P0531?

Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

Cost of diagnosing the P0531 code

Labor: 1.0

The cost of diagnosing the P0531 code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

When is the code detected?

The P0531 code is detected when the signal circuit is out of range for 20 seconds.

Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)
  • A/C Inoperative
  • A/C Blows Warm

P0531 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 P0531 - A/C Refrigerant Pressure Sensor Circuit Range/Performance - AutoCodes.com

P0531 More Information

Need more information on how to fix the P0531 code?
Get Access to Factory Service Manuals

Information for specific makes

  • P0531 CHRYSLER A/C Refrigerant Pressure Sensor Circuit Range/Performance
  • P0531 DODGE A/C Refrigerant Pressure Sensor Circuit Range/Performance
  • P0531 JEEP A/C Refrigerant Pressure Sensor Circuit Range/Performance
  • P0531 MAZDA A/C Refrigerant Pressure Sensor Circuit Range/Performance
  • P0531 MERCEDES-BENZ A/C Refrigerant Pressure Sensor Circuit Range/Performance

Need more help?

Get the P0531 code diagnosed by a professional: Find a repair shop in your area

Comments

Help us improve AutoCodes.com. Leave a comment below or tell us if the information above help you fix the code. What are the symptoms on your vehicle for the P0531 code? Have you replaced any parts?
Any information is appreciated. Thanks
Top ⇧