Engine-Codes - Generic - P0840

P0840 Code - Transmission Fluid Pressure Sensor/Switch 'A' Circuit

- Code Popularity: 27,434 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents

|What are the Possible Causes of the P0840 Code?

  • Faulty Transmission Fluid Pressure Sensor/Switch 'A'
  • Transmission Fluid Pressure Sensor/Switch 'A' harness is open or shorted
  • Transmission Fluid Pressure Sensor/Switch 'A' poor electrical connection
  • Transmission Valve Body

|How to Fix the P0840 Code?

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 P0840 code?

Labor: 1.0

The cost to diagnose the P0840 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.

|What are P0840 code possible symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

|What Does the P0840 Code Mean?

The Transmission Control Module (TCM) monitors the Transmission Fluid Pressure Sensor/Switch signal. The TCM sets the OBDII code when the Transmission Fluid Pressure Sensor/Switch is not to factory specifications.

Transmission Fluid Pressure Sensor/Switch 'A' Circuit

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