Jump to content

470 ccrs ea7

Recommended Posts

Morning all 

I have a 2007 Mack trident 470 ccrs ea7 keeps throwing  

code 4-5  turbo actuator 

I have tested the actuator and there is nothing visually wrong with it and no air leaking out of the diaphram 

Cannot find any other boost leaks  or rubbed through hoses 

I am thinking it may be the 2 sensors in the intake  manifold one at top front one at rear behind computer  

any help or pointers appreciated 

note engine photos is not my engine. Just as a guide  as I’ve been told there is a few different ones 



Link to comment
Share on other sites

Mack has a good bulletin on the 4-5 code on the CCRS 460 engine. Only the higher HP levels CCRS engines used the wastegated turbos. Not to be confused with the ASET 4-5 code with the VGT turbos . On the CCRS 460 , in the engine software there is derate for overboosting and if the boost is to low then of course you have low power. So the  wastegate adjustment has to be set up perfect.  I’ll see if I can find the bulletin 

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Recently Browsing   0 members

    • No registered users viewing this page.
  • Create New...