What does code P1799 mean?

Q: What does code P1799 mean?

Hold Switch Circuit. P1799 on Nissan vehicles indicates that the Transmission Control Module (TCM) has detected an abnormal voltage signal in the hold switch circuit, which is used to activate the manual hold mode that keeps the transmission in a selected gear. The TCM monitors the switch input and sets this code when the signal is outside the expected range, often due to a faulty switch, wiring issue, or connector problem.

DTC codes / Nissan codes / P1799

P1799 · NissanHold Switch Circuit

P1799 on Nissan vehicles indicates that the Transmission Control Module (TCM) has detected an abnormal voltage signal in the hold switch circuit, which is used to activate the manual hold mode that keeps the transmission in a selected gear. The TCM monitors the switch input and sets this code when the signal is outside the expected range, often due to a faulty switch, wiring issue, or connector problem.

SystemPowertrain

Code typeNissan specific

SeverityLow

Fix difficultyIntermediate

AreaTransmission

Guidance is general and written for Nissan vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.