P0744 NISSAN - Torque Converter Clutch Circuit Intermittent
P0744 NISSAN Possible Causes
- 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
- Low transmission fluid level
- Dirty transmission fluid
How do I fix code P0744 NISSAN
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.
P0744 NISSAN Tech NotesWhen the a transmission solenoid is working intermittent, in most cases the problem is not the electrical part of the solenoid; the problem is foreign material obstructing the mechanical function of the solenoid or the flow of the fluid through the transmission valve body. If the transmission fluid is very dirty, it is recommend changing the transmission fluid and if possible removing the transmission pan for further diagnosis. Excessive debris or metal particles on the transmission pan could be an indication that there is a transmission mechanical failure and that the transmission will need to be rebuilt or replaced.
There is a factory service bulletin for the following Nissan Models:
2007-2008 Nissan Altima
2007-2008 Nissan Rogue
2007-2008 Nissan Sentra
The bulletin suggests replacing the transmission valve body.
Nissan Factory Service Bulletin OBDII Code P0744
Cost of diagnosing the P0744 NISSAN code
Labor: 1.0The cost of diagnosing the P0744 NISSAN code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.
When is the P0744 NISSAN code detected?The P0744 is detected when A/T cannot perform lock-up even if electrical circuit is good.
P0744 NISSAN Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P0744 NISSAN MeaningThe Torque Converter Clutch (TCC) solenoid valve is activated, with the gear in D4, by the Transmission Control Module (TCM) in response to signals sent from the vehicle speed and the Engine Control Module (ECM). Lock-up piston operation will then be controlled. When the torque converter clutch solenoid valve is activated, the torque converter lockup clutch will engage creating a 1 to 1 RPM ratio between the transmission input shaft and the rotational speed of the torque converter.
Lock-up operation, however, is prohibited when A/T fluid temperature is too low.
When the accelerator pedal is depressed (less than 2/8) in lock-up condition, the engine speed should not change abruptly. If there is a big jump in engine speed, there is no lock-up.
P0744 NISSAN More InformationNeed more information on how to fix the P0744 NISSAN code?
Get Access to Factory Service Manuals
P0744 NISSAN Information for specific Nissan models
- P0744 2002 NISSAN ALTIMA SEDAN
- P0744 2003 NISSAN ALTIMA SEDAN
- P0744 2004 NISSAN ALTIMA SEDAN
- P0744 2005 NISSAN ALTIMA SEDAN
- P0744 2006 NISSAN ALTIMA SEDAN
- P0744 2008 NISSAN ROGUE
- P0744 2009 NISSAN ROGUE
- P0744 2010 NISSAN ROGUE
- P0744 2011 NISSAN ROGUE
- P0744 2012 NISSAN ROGUE
- P0744 2013 NISSAN ROGUE
- P0744 2002 NISSAN SENTRA
- P0744 2003 NISSAN SENTRA
- P0744 2004 NISSAN SENTRA
- P0744 2005 NISSAN SENTRA
- P0744 2006 NISSAN SENTRA