What does code P1789 mean?

Q: What does code P1789 mean?

Pressure Control Solenoid B Circuit Shorted. P1789 on Nissan vehicles means the transmission control module (TCM) has detected a short circuit in the electrical path for pressure control solenoid B, which is one of the linear solenoids inside the valve body that regulates hydraulic pressure. The TCM monitors the solenoid's command wire for voltage outside the expected range and sets this code when the circuit is grounded or shorted to power.

DTC codes / Nissan codes / P1789

P1789 · NissanPressure Control Solenoid B Circuit Shorted

P1789 on Nissan vehicles means the transmission control module (TCM) has detected a short circuit in the electrical path for pressure control solenoid B, which is one of the linear solenoids inside the valve body that regulates hydraulic pressure. The TCM monitors the solenoid's command wire for voltage outside the expected range and sets this code when the circuit is grounded or shorted to power.

SystemPowertrain

Code typeNissan specific

SeverityMedium

Fix difficultyProfessional

AreaTransmission

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