P0709 GMC Transmission Range Sensor Circuit Intermittent

Possible causes

– Faulty Park/neutral position switch
– Misadjusted park/neutral position switch
– Park/neutral position switch harness is open or shorted
– Park/neutral position switch circuit poor electrical connection

Symptoms

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

P0709 GMC Description

The park/neutral position (PNP) switch includes a transmission range switch. The transmission range switch detects the selector lever position when the shift lever is in the N or P shift position and sends a signal to the Transmission Control Module (TCM).