Possible causes
– Low transmission fluid level
– Dirty transmission fluid
– Faulty torque converter clutch solenoid valve
– Torque converter clutch solenoid valve harness is open or shorted
– Torque converter clutch solenoid valve circuit poor electrical connection
– Dirty transmission fluid
– Faulty torque converter clutch solenoid valve
– Torque converter clutch solenoid valve harness is open or shorted
– Torque converter clutch solenoid valve circuit poor electrical connection
When is the obd code mean?
Diagnostic trouble code P0740 is detected when TCM detects an improper voltage drop when it tries to operate the solenoid valve.
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
– Transmission shift shock
– Vehicle may not shift into the highest gear
– Transmission shift shock
– Vehicle may not shift into the highest gear
P0740 NISSAN OBD Code Description