Engine-Codes - Generic - P1780

P1780 - Transmission Control Switch Out of Self-Test Range

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

P1780 Possible Causes

  • Transmission Control Switch (TCS) not cycled during the self-test
  • Faulty Transmission Control Switch
  • Transmission Control Switch harness is open or shorted
  • Transmission Control Switch circuit poor electrical connection

How is the P1780 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 P1780 code

Labor: 1.0

The cost to diagnose the P1780 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.
How much do you know about cars?

Take the AutoCodes.com automotive tests and turbo-charge your car repair knowledge

Play Now

Possible Symptoms

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

P1780 Meaning

The Transmission Control Switch (TCS) is a momentary contact switch that is located on the end of the transmission control selector lever. Pushing the TCS will either disengage or engage the overdrive function of the transmission. During Key ON Engine Running (KOER) self-test the TCS must be cycled, the Diagnostic Trouble Code (DTC) will set anytime Powertrain Control Module (PCM) detects a TCS out of self-test range.

More Information

Need more information on how to fix the P1780 code?
Get Access to Factory Service Manuals

Information for specific makes

Need more help?

Get the P1780 code diagnosed by a professional: Find a repair shop in your area