P2774 – High Four-Wheel Drive Low Switching Circuit

P2774 Possible Causes

  • Faulty four-wheel drive low switch
  • Four-wheel drive low switch harness is open or shorted
  • Poor electrical connection in four-wheel drive switch circuit

How to Fix Code P2774

Check 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 pins.

Possible Symptoms

Check Engine Light on (or Service Engine Soon warning light)

P2774 Meaning

The Transmission Control Module (TCM) monitors the signal from the four-wheel drive low switch circuit. The TCM sets the OBDII code when the four-wheel drive low switch circuit is outside factory specifications.

P2775 – Shift Switch Circuit Range / Performance

P2775 Possible Causes

  • Faulty gear shift switch
  • Gear shift switch harness is open or short-circuited
  • Poor electrical connection in the gear shift switch circuit

How to Fix Code P2775

Check the “Possible Causes” listed above. Visually inspect the wiring harness and related connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

Possible Symptoms

Engine light on (or service engine soon warning light)

P2775 Meaning

The Engine Control Module (ECM) monitors the signal from the gear shift switch circuit. The ECM sets the OBDII code when the gear shift switch circuit signal does not meet factory specifications.

P2776 – Low Shift Switch Circuit

P2776 Possible Causes

  • Faulty gear shift switch
  • Gear shift switch harness is open or short-circuited
  • Poor electrical connection in the gear shift switch circuit

How to Fix Code P2776

Check the “Possible Causes” listed above. Visually inspect the wiring harness and related connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

Possible Symptoms

Check engine light on (or service engine soon warning light)

P2776 Meaning

The Engine Control Module (ECM) monitors the signal from the gear shift switch circuit. The ECM sets the OBDII code when the gear shift switch circuit signal does not meet factory specifications.

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P2777 – High Shift Switch Circuit

P2777 Possible Causes

  • Faulty gear shift switch
  • The gear shift switch harness is open or short-circuited
  • Poor electrical connection in the gear shift switch circuit

How to Fix Code P2777

Check the “Possible Causes” listed above. Visually inspect the wiring harness and related connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

Possible Symptoms

Engine light on (or service engine soon warning light)

P2777 Meaning

The Engine Control Module (ECM) monitors the signal from the gear shift switch circuit. The ECM sets the OBDII code when the gear shift switch circuit signal does not meet factory specifications.

P2778 – Intermittent/Erratic Shift Switch Circuit

P2778 Possible Causes

  • Faulty shift switch
  • Shift switch harness is open or shorted
  • Poor electrical connection in the shift switch circuit

How to Fix Code P2778

Check the “Possible Causes” listed above. Visually inspect the wiring harness and related connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

Possible Symptoms

Check Engine Light illuminated (or Service Engine Soon warning light)

P2778 Meaning

The Engine Control Module (ECM) monitors the shift switch circuit signal. The ECM sets the OBDII code when the shift switch circuit signal does not meet factory specifications.

P2779 – Downshift Switch Circuit Range / Performance

P2779 Possible Causes

  • Faulty downshift switch
  • Downshift switch harness is open or shorted
  • Poor electrical connection in downshift switch circuit

How to Fix Code P2779

Check the “Possible Causes” listed above. Visually inspect the wiring harness and related connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

Possible Symptoms

Illuminated engine light (or service engine soon warning light)

P2779 Meaning

The Engine Control Module (ECM) monitors the downshift switch circuit signal. The ECM sets the OBDII code when the downshift switch circuit signal is outside factory specifications.

P2780 – Low Shift Switch Circuit

P2780 Possible Causes

  • Faulty downshift switch
  • Downshift switch harness is open or shorted
  • Poor electrical connection in the downshift switch circuit

How to Fix Code P2780

Check the “Possible Causes” listed above. Visually inspect the wiring harness and related connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

Possible Symptoms

Check engine light on (or service engine soon warning light)

P2780 Meaning

The engine control module (ECM) monitors the downshift switch circuit signal. The ECM sets the OBDII code when the downshift switch circuit signal is outside factory specifications.

P2781 – High Shift Switch Circuit

P2781 Possible Causes

  • Faulty kickdown switch
  • Kickdown switch harness is open or shorted
  • Poor electrical connection in kickdown switch circuit

How to Fix Code P2781

Check 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 pins.

Possible Symptoms

Illuminated engine light (or service engine soon warning light)

P2781 Meaning

The Engine Control Module (ECM) monitors the kickdown switch circuit signal. The ECM sets the OBDII code when the kickdown switch circuit signal is outside factory specifications.

P2782 – Intermittent/Irregular Downshift Switch Circuit

P2782 Possible Causes

  • Faulty kickdown switch
  • Kickdown switch harness is open or shorted
  • Poor electrical connection in kickdown switch circuit

How to Fix Code P2782

Check 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 pins.

Possible Symptoms

Engine light on (or service engine soon warning light)

P2782 Meaning

The Engine Control Module (ECM) monitors the kickdown switch circuit signal. The ECM sets the OBDII code when the kickdown switch circuit signal is outside factory specifications.