Engine-Codes - Ford - P0645 Ford

P0645 Ford Code - Air Conditioning Clutch Relay Circuit Malfunction

- Code Popularity: 46,363 Views
- Repair Importance Level: 1/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC P0645 Ford?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Air Conditioning Clutch Relay
  • Air Conditioning Clutch Relay harness is open or shorted
  • Air Conditioning Clutch Relay circuit poor electrical connection
  • Faulty Powertrain Control Module (PCM)
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How to Fix the DTC P0645 Ford?

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 P0645 Ford 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.

What are Code Possible Symptoms?

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

What Does the P0645 Ford Code Mean?

The Powertrain Control Module (PCM) monitors the Air Conditioning Clutch Relay (A/CCR) circuit. The Diagnostic Trouble Code (DTC) when the PCM grounds the Air Conditioning Clutch Relay circuit, excessive current draw is detected on the Air Conditioning Clutch Relay circuit; or, with the Air Conditioning Clutch Relay circuit not grounded by the PCM, voltage is not detected on the Air Conditioning Clutch Relay circuit (the PCM expects to detect VPWR voltage coming through the Air Conditioning Clutch Relay coil to the Air Conditioning Clutch circuit). The PCM detects an open or short exists in Air Conditioning Clutch Relay control circuit.

P0645 Ford Code - Air Conditioning Clutch Relay Circuit Malfunction

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