What causes the P1778 code on a CVT?
The most common issues that cause the P1778 code are flow control valve wear, pulley leaks, and a worn or sticky valve body. The next Jatco CVT you get in with a stepper motor code, think twice before replacing the stepper motor.
How to fix P1778 Nissan step motor function?
Faulty Step Motor Step Motor harness is open or shorted Step Motor circuit poor electrical connection How do I fix code P1778 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.
What’s the difference between circuit code p1777 and p17758?
There’s a major difference between codes P1777 and P1778: Code P1777 is a circuit code. If you have code P1777, you need to check the connectors, wiring, and the stepper motor windings. The resistance check would be a good start, or you could also perform the same test at the TCM.
What causes stepper motor to not change gears?
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. But everything points to a low oil pressure causing the problem. You transmission fluid level is okay.
What does the error code p1776 mean?
Error Code P1776 is defined as Transmission Control Switch Circuit is Out of Self-Test Range. It is set when the KOER (Key On Engine Running) self-test Transmission Control Switch (TCS) is not cycled. This error code is a manufacturer-specific trouble code, meaning it does not apply to all vehicles makes.
Is the Trans fluid pressure low on a P1778?
Because I do have a P1778 code. But I also have a P0868 which is “trans fluid pressure low”. I have the V6 model, not sure if that matters? BTW, I live in the counry about 30 miles from the Twin Cities, and I sometimes have to go there. The drivers on the road near and in the cities are much more aggressive drivers than us country folks.
What to do when your Nissan P1778 Got you Down?
7)take a piece of dental floss about a foot long and hold the spring loaded arm back against the stepper motor and return the valve body back to the transmission. 8)after you have a few bolts in place remove the floss before you tighten all the way.
What should I do if I keep throwing P1778?
Though having been there before your stepper motor may be on the way out. Start with flush, then trans cooler. If your still throwing p1778 then change stepper motor. The fluid may just be low and worn…