Engine-Codes - Ford - P0534 1999 Ford F150

P0534 1999 Ford F150 Code - Low A/C Cycling Period

- Code Popularity: 1,607 Views
- Repair Importance Level: 1/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC P0534 1999 Ford F150?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other 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

Code Tech Notes

Indicates frequent A/C compressor clutch cycling.

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How to Fix the DTC P0534 1999 Ford F150?

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 pins.

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What is the Cost to Diagnose the Code?

Labor: 1.0

The cost to diagnose the P0534 1999 Ford F150 code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.

When is the Code Detected?

The ECM has detected that the AC compressor clutch cycle rate is high

What are Code Possible Symptoms?

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

What Does the P0534 1999 Ford F150 Code Mean?

The powertrain control module (ECM) 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 ECM 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.

P0534 1999 Ford F150 Code - Low A/C Cycling Period

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