What is Engine code P1778?
The code P1778 is due to a problem with the step motor actuators inside the CVT transmission not moving the pulleys to a higher gear position and this is why your engine is revving too high.
Where is the speed sensor located on a 2007 Nissan Sentra?
On Nissan vehicles equipped with the CVT transmission, the input speed sensor is located on the side of the transmission housing.
What is the code for the CVT stepper motor?
To keep it simple, the stepper motor can extend or retract, moving the position of the ratio control valve. The transmission control module knows that the stepper motor controls the ratio. When it sees a ratio issue, it blames the stepper motor and sets stepper motor code P1778.
What does P1778 code after installing new stepper motor mean?
P1778 code after installing new stepper motor. Many don’t realize , this goes for virtually any code (s) retrieved – NEVER ABSOLUTELY MEANS THAT SPECIFIC PART IS BAD needing replacement.
What is the factory code for a step motor?
Code P1778 is a very common code and very misleading. The factory manual describes it as, “P1778 Step Motor Circuit Intermittent.” The set conditions listed in the factory manual are, “There is a great difference between the number of steps for the stepping motor and for the actual gear ratio.”
What is the stepper code on a JATCO CVT?
If you’ve had to diagnose a Jatco CVT transmission by now, chances are you’ve seen the familiar stepper motor code, P1778. The stepper motor is one of the most over-replaced parts in these CVTs.
What does p1777 mean on Nissan step motor circuit?
The P1777 code means that there is a problem with transmission. You next step is to have the dealer or a transmission shop inspect the transmission. Make sure to contact your dealer and ask if the transmission is still cover under warranty. 2007 altima passed warranty. Same code and can’t afford a new transmission.
What does stepper motor do on Nissan club?
The stepper motor has nothing to do with pump output which cannot be blocked other than by a pressure regulator. The stepper actually controls the spread of the primary pulley halves to change the effective gear ratio as needed. It is basically the shift control there.
To keep it simple, the stepper motor can extend or retract, moving the position of the ratio control valve. The transmission control module knows that the stepper motor controls the ratio. When it sees a ratio issue, it blames the stepper motor and sets stepper motor code P1778.
Code P1778 is a very common code and very misleading. The factory manual describes it as, “P1778 Step Motor Circuit Intermittent.” The set conditions listed in the factory manual are, “There is a great difference between the number of steps for the stepping motor and for the actual gear ratio.”