P1540 - A/C System High Pressure

Repair Importance Level: 3/3
Repair Difficulty Level: 2/3  What does this mean?

P1540 Possible Causes

  • Low A/C System Refrigerant
  • Faulty A/C System Pressure Sensor
  • A/C System Pressure Sensor harness is open or shorted
  • A/C System Pressure Sensor circuit poor electrical connection

First diagnose P1540 code

    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 terminals.

Cost of diagnosing the P1540 code

    Labor: 1.0

    The cost of diagnosing the P1540 code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.

P1540 Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P1540 Meaning

The Powertrain Control Module (PCM) monitors the A/C System Pressure Sensor. The PCM sets the OBDII code when the A/C System Pressure Sensor is not to factory specifications.
OBDII Code P1540 - A/C System High Pressure - Engine-Codes.com

P1540 More Information

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P1540 Information for specific makes

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