Login  |  Register
Nissanhelp.com - All About Nissan
Do-It-Yourself Maintenance Owners Manuals Recalls/Campaigns Service Bulletins Service Manuals Nissan OBDII Codes Glossary & Acronyms More...
Member's Ride Photos Stock Photo Gallery
Classifieds - For Sale Classifieds - Wanted To Buy Classifieds - Mechanic Wanted Classifieds - Auto Services Search Auto Parts
Register FAQ Social Groups Mark Forums Read
2011 atima codes p11778 and p0420 help Forums > > 2011 atima codes p11778 and p0420 help 2011 atima codes p11778 and p0420 help
Forgot Password? Join Us!


Altima Nissan Altima Sedan Discussion Forum

Reply
 
Thread Tools Display Modes
  #1  
Old 03-31-2017, 06:21 PM
Mike62202 Mike62202 is offline
Registered User
2011 Altima Sedan
 
Join Date: Mar 2017
Posts: 3
Default 2011 atima codes p11778 and p0420 help

Have a 2011 altima with 167264 miles,ran fine then when it warms up two codes pop up.p1778 and p0420 then the car seems like power loss and had to drive 40 mph home.checked codes and cleared,again ran fine for 30 minutes then codes again,any help please
Reply With Quote
  #2  
Old 03-31-2017, 06:36 PM
NissanTech's Avatar
NissanTech NissanTech is offline
Super Moderator
2004 Xterra
 
Join Date: Jun 2005
Location: California
Age: 48
Posts: 12,291
Default

Unfortunately, the P1778 code means you have a problem with transmission.

P1778 NISSAN - Step Motor Function
Read more: https://www.autocodes.com/p1778_nissan.html

And the P0420 code means that the catalytic converter has failed.

P0420 NISSAN - Catalyst System Efficiency Below Threshold Bank 1
Read more: https://www.autocodes.com/p0420_nissan.html
__________________
Need A Repair Shop?
Find local automotive repair shops in your area.
AutoCodes.com Shops
Reply With Quote
  #3  
Old 03-31-2017, 06:43 PM
Mike62202 Mike62202 is offline
Registered User
2011 Altima Sedan
 
Join Date: Mar 2017
Posts: 3
Default

Is it possable the bad cat is heating up trans and it's going into safe mode
Reply With Quote
  #4  
Old 03-31-2017, 10:18 PM
bennyb53's Avatar
bennyb53 bennyb53 is offline
Moderator
2002 Altima
2002 Altima
 
Join Date: Jan 2011
Location: Hawaii
Posts: 2,104
Default

Quote:
Originally Posted by Mike62202 View Post
Is it possable the bad cat is heating up trans and it's going into safe mode
Aagh Negative. If you look closely the Tranny is not connected to the CAT. So the CAT and Transmission do not interact with each other.

The power produced by the engine is transmitted to the Torque Converter which in turn transmitted to the transmission consisting of many gear sets like the planetary set up; planetary gear, sun gear, ring gear which changes the gear ration according to engine speed. This is also controlled by electronic module like the Valve Body in automatic transmission. In manual transmission, you have to manually shift the lever to change the gear ratio say from 1st gear to second and to Third, etc.

You mentioned the car goes into a Limp Mode probably caused by the DTC P1778. I suggest you have it properly diagnosed. At 167k miles I won't be surprised the CAT (P420) has failed and will need to be replaced.
Reply With Quote
Reply

Bookmarks

Tags
2011, atima, codes, p0420, p11778

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -8. The time now is 07:08 PM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
Search Engine Optimisation provided by DragonByte SEO v2.0.42 (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.