What does code P1550 mean?

Q: What does code P1550 mean?

TCC Solenoid Valve. P1550 on Nissan vehicles indicates that the torque converter clutch (TCC) solenoid valve circuit has an electrical fault, such as an open, short, or excessive resistance. The transmission control module (TCM) monitors the solenoid's electrical current and sets this code when the measured value falls outside the expected range, preventing proper lockup of the torque converter.

DTC codes / Nissan codes / P1550

P1550 · NissanTCC Solenoid Valve

P1550 on Nissan vehicles indicates that the torque converter clutch (TCC) solenoid valve circuit has an electrical fault, such as an open, short, or excessive resistance. The transmission control module (TCM) monitors the solenoid's electrical current and sets this code when the measured value falls outside the expected range, preventing proper lockup of the torque converter.

SystemPowertrain

Code typeNissan specific

SeverityMedium

Fix difficultyIntermediate

AreaVehicle speed, idle control and auxiliary inputs

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