Park/Neutral Position Switch Malfunction
Table of contents
P1780 LEXUS 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
- Faulty Engine Control Module (ECM)
How do I fix code P1780 LEXUS?
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’s pins.
Cost of diagnosing the P1780 LEXUS code
The cost of diagnosing the P1780 LEXUS code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P1780 LEXUS Description
The Park/Neutral Position (PNP) switch detects the shift lever position and sends signals to the Engine Control Module (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.