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P1780 MERCURY

P1780 MERCURY - Transmission Control Switch Circuit is Out of Self-Test Range

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3   
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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

Possible symptoms

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

P1780 Mercury Description

During Key ON Engine Running (KOER) self-test the Transmission Control Switch (TCS) must be cycled, or the P1780 code is set.
OBDII Code P1780 Mercury - Transmission Control Switch Circuit is Out of Self-Test Range - AutoCodes.com

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P1780 MERCURY Comments

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