Can anyone let me know if what I should do or need to do about this code; how severe it may be, is it expensive to fix what I should do...? anything or advice will be sufficient. Below I have put the information I have found on the code.
http://engine-codes.com/p1778_nissan.html
P1778 NISSAN - Step Motor Function
Possible causes
- Faulty Step Motor
- Engine Light ON (or Service Engine Soon Warning Light)
P1778 NISSAN Description
The step motor's 4 aspects of ON/OFF change according to the signal from Transmission Control Module (TCM). As a result, the flow of line pressure to primary pulley is changed and pulley ratio is controlled. This diagnosis item detects when electrical system is OK, but mechanical system is NG. This diagnosis item detects when the state of the changing the speed mechanism in unit does not operate normally.
Read more: http://nissanhelp.com/diy/obd_codes/p17 ... z3PXM2dz85
Engine code P1778-PLEASE HELP!!
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Niklaus1024
- Posts: 5
- Joined: Wed Dec 03, 2014 11:44 pm
- Car: 2008 altima coupe 3.5SE
Re: Engine code P1778-PLEASE HELP!!
That code is related to the CVT transmission valve body. Common problem with the trannies on altima coupes. Do you have the 120k transmission warranty?
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Niklaus1024
- Posts: 5
- Joined: Wed Dec 03, 2014 11:44 pm
- Car: 2008 altima coupe 3.5SE
Re: Engine code P1778-PLEASE HELP!!
The warranty has expired as I have 127,000 miles on the car currently. Is there anyway to repair this issue w/out replacing the entire transmission?
Re: Engine code P1778-PLEASE HELP!!
Hey folks,
I can't find any info on having success solving the step motor issue associated with this code P1778 and with the 2007-09 Nissan Altima 2.5. I know they have Jatco CVT transmission JE0F10A. Did this thread die out? Are you still dealing with this or how did you resolve it?
I'm dealing with this issue right now and some others associated with this CVT, simultaneously, like the whining bearing.
Glad to know what the code points to: mechanical. So something in the pressure system malfunctioning??? Does everyone know about the in-line CVT fluid filter that receives fluid after it passes through the radiator cooler? Just changed mine. Definitely clogged, and when replaced, transmission now holds (doesn't roll back) on inclines. AND, with the new fluid, the whining is gone (at least in the first 200 miles after flush.)
I can't find any info on having success solving the step motor issue associated with this code P1778 and with the 2007-09 Nissan Altima 2.5. I know they have Jatco CVT transmission JE0F10A. Did this thread die out? Are you still dealing with this or how did you resolve it?
I'm dealing with this issue right now and some others associated with this CVT, simultaneously, like the whining bearing.
Glad to know what the code points to: mechanical. So something in the pressure system malfunctioning??? Does everyone know about the in-line CVT fluid filter that receives fluid after it passes through the radiator cooler? Just changed mine. Definitely clogged, and when replaced, transmission now holds (doesn't roll back) on inclines. AND, with the new fluid, the whining is gone (at least in the first 200 miles after flush.)
Re: Engine code P1778-PLEASE HELP!!
I had mine changed at 59,950 miles thank god it was under warranty. I left my car there at 12 noon and got it the next day at 5. Could possibly be a costly repair, but all they do is change a valve and clear codes. After that my Cvt drove like a charm