OBDII Code List

P1915 CADILLAC - Internal Mode Switch Start/Wrong Range

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

P1915 Cadillac Description

The manual shift detent lever with shaft position switch assembly, or Internal Mode Switch (IMS) assembly is a sliding contact switch attached to the control valve body within the transmission. The 4 inputs to the Transmission Control Module (TCM) from the switch indicate which position is selected by the transmission manual shaft. The input voltage at the TCM is high when the switch is open and low when the switch is closed to ground. The state of each input is displayed on the scan tool as IMS. The IMS input parameters represented are transmission range signal A, Signal B, signal C, and signal
OBDII Code P1915 Cadillac - Internal Mode Switch Start/Wrong Range -

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