Engine-Codes - Generic - P0943

P0943 - Hydraulic Pressure Unit Cycling Period Too Short

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What is this?
Table of contents

P0943 Possible Causes

  • Low transmission fluid level
  • Shift Lever Position
  • Plugged Transmission filter
  • Faulty Transmission Oil Pump

How is the P0943 code repair?

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.

What is the cost to diagnose the P0943 code

Labor: 1.0

The cost to diagnose the P0943 code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.
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Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)
  • Delay of shifting

P0943 Meaning

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.

More Information

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Information for specific makes

  • P0943 DODGE Hydraulic Pressure Unit Cycling Period Too Short

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