P1819 GMC - Internal Mode Switch

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3   
Comments  |  Add Comment

Possible causes

  • Faulty Internal Mode Switch
  • Internal Mode Switch harness is open or shorted
  • Internal Mode Switch circuit poor electrical connection

Possible symptoms

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

P1819 Gmc Description

With the key in Start (crank) position, system voltage from 9-18v, the Powertrain Control Module (PCM) detects an invalid combination of Internal Mode Switch signals, or a set of signals that indicated a transitional state between gear positions, condition met for 0.5 seconds.
OBDII Code P1819 Gmc - Internal Mode Switch - AutoCodes.com

Need more help?

Get the P1819 Gmc code diagnosed by a professional: Find a repair shop in your area

Related Information

P1819 GMC Comments

Help us improve AutoCodes.com. Leave a comment below or tell us if the information above help you fix the code. What are the symptoms on your vehicle for the P1819 Gmc code? Have you replaced any parts?
Any information is appreciated. Thanks
Top ⇧