Diagnostic Trouble Code: P0172
Diagnostic Trouble Code Name: Fuel System too rich (I6, bank 1- V8)
Vehicle Make: Ford
Vehicle Model: Falcon (BA)
Diagnostic Code Entered By: ZerOne
Diagnostic Code Entered On: Wed Oct 06, 2010 11:00 pm
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Please Note: The DTC Information provided has been randomly generated.
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Diagnostic Trouble Code Description:
Coil Compressor Stroke Control Circuit
Possible Sensor Faults
Heating, Ventilation, A.C. (HVAC)
Possible Related Diagnostic Trouble Codes
DTC B013B
Circuit / System Description
The A/C system uses a clutchless variable stroke compressor with an electrical control valve which is used to alter the displacement of the compressor, this process is known as electronic control valve displacement (ECVD). ECVD at the compressor is controlled by pulse width modulated (PWM) signal supplied by the HVAC control module via the A/C compressor supply voltage circuit. When the A/C button is pressed, the HVAC control module grounds the A/C compressor low reference circuit completing the circuit and in turn allowing the compressor to operate. The signal returned to the HVAC control module via the A/C low reference circuit is also used in comparison to the supplied signal to confirm correct compressor operation and ECVD positioning.
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