Start by checking 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's pins.
The cost to diagnose the P0943 code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.
Line pressure is electronically controlled by the Transmission Control System (TCM) and is measured by the Line Pressure Sensor (LPS). The desired line pressure is continuously being compared to the actual line pressure and is regulated by electronically changing the duty cycle of the Pressure Control Solenoid (PCS). The Transmission Control System calculates the desired line pressure based on inputs from the transmission and engine. A calculated torque input to the transmission is used as the primary input to the desired line pressure calculation and is called Torque Based Line Pressure. The Transmission Control Module (TCM) monitors the Hydraulic Pressure Sensor. The TCM sets the OBDII code when the Hydraulic Pressure Sensor is not to factory specifications.
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