What is check engine code p1788?
AnswerSymptom:P1788-2/4 HYDRAULIC PRESSURE TEST FAILUREWhen Monitored and Set Condition:P1788-2/4 HYDRAULIC PRESSURE TEST FAILUREWhen Monitored: In any forward gear with engine speed above 1000 RPM shortly aftera shift and every minute thereafter.Set Condition: After a shift into a forward gear, with engine speed > 1000 RPM, the TCMmomentarily turns on element pressure to the clutch ckts that don't have pressure toidentify the correct pressure sw closes. If the pressure sw does not close 2 times the codesets.POSSIBLE CAUSESLOSS OF PRIME P1791 PRESENTRELATED DTC'S PRESENTTRANSMISSION FLUID LEVELINTERMITTENT WIRING AND CONNECTORSTRANSMISSION CONTROL RELAY OUTPUT CIRCUIT OPEN2/4 PRESSURE SWITCH SENSE CIRCUIT OPEN2/4 PRESSURE SWITCH SENSE CIRCUIT SHORT TO GROUND2/4 PRESSURE SWITCH SENSE CIRCUIT SHORT TO VOLTAGEINTERNAL TRANSMISSIONTCM - 2/4 HYDRAULIC PRESSURE