P1780 Cadillac Park/Neutral Position Switch Malfunction
Possible causes
– Faulty Park/Neutral Position (PNP) switch
– Park/Neutral Position (PNP) switch harness is open or shorted
– Park/Neutral Position (PNP) switch circuit poor electrical connection
– Misadjusted Park/Neutral Position (PNP) switch
– Park/Neutral Position (PNP) switch harness is open or shorted
– Park/Neutral Position (PNP) switch circuit poor electrical connection
– Misadjusted Park/Neutral Position (PNP) switch
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
P1780 Cadillac Description
The Park/Neutral Position (PNP) switch detects the shift lever position and sends signals to the ECM. The ECM receives signals (NSW, R, 2 and L) from the park/neutral position switch. When the signal is not sent to the ECM from the park/neutral position switch, the ECM judges that the shift lever is in D position.
Cadillac Vehicle:Cadillac CTS Coupe, Cadillac CTS-V Coupe , Cadillac Eldorado , Cadillac Escalade EXT , Cadillac ATS , Cadillac CTS , Cadillac CTS Sedan , Cadillac CTS Sport Sedan , Cadillac CTS-V , Cadillac CTS-V Sedan , Cadillac Catera , Cadillac DTS , Cadillac DeVille , Cadillac STS-V , Cadillac STS , Cadillac Seville , Cadillac XTS , Cadillac XLR , Cadillac XLR Platinum , Cadillac Escalade , Cadillac SRX