P1727

P1727 - 4C HYDRAULIC PRESSURE TEST FAILURE

When Monitored and Set Condition:
P1727 - 4C HYDRAULIC PRESSURE TEST FAILURE

When Monitored: In any forward gear with engine speed above 1000 RPM shortly after a shift and every minute thereafter.

Set Condition: After a shift into a forward gear, with engine speed > 1000 RPM, the TCM momentarily turns on element pressure to the clutch ckts that don't have pressure to identify the correct pressure sw closes. If the pressure sw does not close 2 times the code sets.

POSSIBLE CAUSES:
RELATED LINE PRESSURE DTC'S PRESENT
RELATED SPEED RATIO AND/OR PRESSURE SWITCH DTC PRESENT
POOR LPS CONNECTION
INTERMITTENT WIRING & CONNECTORS
INCORRECT FLUID LEVEL
4C PRESSURE SWITCH SENSE CIRCUIT OPEN
5-VOLT SUPPLY CIRCUIT OPEN
TRANSMISSION RELAY OUTPUT CIRCUIT OPEN
4C PRESSURE SWITCH SENSE CIRCUIT SHORT TO GROUND
5-VOLT SUPPLY CIRCUIT SHORT TO GROUND
4C PRESSURE SWITCH SENSE CIRCUIT SHORT TO VOLTAGE
EXCESSIVE DEBRIS IN OIL PAN
INTERNAL TRANSMISSION - 4C PRESSURE TEST
LINE PRESSURE SENSOR
TCM - 4C PRESSURE SWITCH
TCM - NO 5 VOLTS LOW LINE PRESSURE SENSOR