Where can I start, possible solutions, etc. . This is not caused by an electrical malfunction, circuits open or shorted, but by a mechanical malfunction such as control valve sticking, improper solenoid valve operation, malfunctioning oil pump or torque converter clutch, etc. Only a thorough inspection will help you to find and fix the problem once and for all. The two codes are listed in picture for causes, but 178 is the step motor which means it works okay electrically, but mechanically there is something wrong. Let me know how it went with your car. Hopefully that makes sense, I just feel like the transmission is a default and I got screwed somehow because I've taken good care of the car, never had issues until this came up.
But as far as lockings concerned, I've noticed sometimes when I just shift to neutral, it's almost like a reset button. If the P0744 is detected, the issue should be addressed right away. If you are living in U. The main problem seems to be line pressure and my mechanic told me it can be a simple problem to a complex one where he will be required to open the transmission and check. The P0744 code may be stored if the torque converter clutch solenoid is faulty, or if the torque converter is defective. Make sure your mechanic follows those steps.
Or cleaned the line pressure lines in case there was something clogging the solenoid valves? After doing that in case that is not the problem. Hi Luchoae, I am really sorry to hear that you too are having same problems as mine. Manufacturers are slow to teach outside mechanics about them. The code definition is servo valve solenoid circuit malfunction. In later car models, the car's computer can usually keep the vehicle running, but the engine warning light on the dashboard goes on to warn the driver.
When 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 either sensor isn't working correctly, the car will run rough and the engine will be less efficient. And also, did your mechanic checked the solenoids? Sai, did you changed the solenoid as well or just the step motor? Where is the P0744 sensor located? For example guys, When I'm stalled at the light and want to start driving the engine barely speeds up and it's like i'm holding down the gas pedal and its just sloowwly getting up to 30-40 mph,, till eventually after like 10 seconds I get up to 50-60 and run into no problems after I hit high speeds. But from what I have seen there is a mechanical problem inside the transmission that is needing repair. The vehicle will not shift into 3rd or 4th gear. Mine was 2011 Altima 3.
The indication begins with the start code 12. If you ever need help with your car let me know, I owe you, we have some softwares with a lot of data that might help you. Did you ever measured your transmission pressure with a test gauge? It now shows only P0868 code. The only other thing I could tell you is to have an independent transmission shop take a peek at it. From my experience, I can suggest you following - 1. That means rough idle and poor engine shakes. How serious is the P0744 code? Now don't ask yourself; What should you do with P0744 code? However, an oxygen sensor is easy to replace on many cars and is usually detailed in the owner's manual.
If you see the check engine light, you can go to autozone and they if you ask themn nicely can connect a code reader diagnostic analysis tool which gets connected under the dash. Please or to join the conversation. So changing motor will not help at all and yes it needs to be opened up to replace it. Yes 30k to 50k pesos is way more than here. Check the gas cap first.
I noticed that after driving for more than thirty to forty minutes in side the city, there was little delay in the acceleration when I depress the accelerator. If you have not done a tuneup in a long time that could be another cause so do this first reset the codes and drive it and see if the codes come back. Do I need to replace the whole transmission? 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. If the code returns, the mechanic can continue on to further repairs. The trans fluid is expensive so make sure you use the right amount.
The stepper motor is effected by line pressure so you may have had an oil pump failure as the other two codes relate to low oil pressure so it will not allow the stepper motor to change the gears or make the pulleys move to change them. Tech notes When 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. What causes the P0744 code? In other words it will display code 12 to let … you know that you are in diagnostic mode. Here to rebuild the transmission is like 18k to 20k pesos. Though I changed the stepper motor, the codes came back after couple of weeks.