Code 77

[blutrotsonic]

First thing, I did not know where to post this nor do I know if this was discussed before as the search function will only search for words 4 characters or more. Basically, what is code 77? It has occurred twice now on cold starts in my new RS. Waiting approx. 1-2 minutes and it goes away. Overall, I wanted to know for myself before taking it to the dealership.

 

[Natesriv]

Egr #3 solenoid error......Google search.....aren't obd codes shared?
Intake valve control circuit
http://www.outilsobdfacile.com/home.php

 

[blutrotsonic]

That would make sense, that they will carry over the same codes, but knowing GM. So it is not effecting drive-ability as I just commuted home 45 minutes with the code displayed. Cannot discern any differences using the ultragauge. :blankface:

 

[Natesriv]

P0077? Is what's being displayed?

 

[blutrotsonic]

P0077? Is what's being displayed?

What exactly is P0077, and where would it be displayed? I currently went outside and checked the car display and it says in the lower bottom right 77 and top right "code". I just checked my Ultragauge, no TC's and no pending TC's.

 

[laborsmith]

77 or 27?

Laborsmith

 

[blutrotsonic]

77.

 

[Maddmatts]

There are 2-digit codes partially listed in the "Instruments and Controls" section of the manual. My 2012 manual doesn't list a Code 77 though so it might be something deemed "Not owner serviceable". The manual states that non-urgent codes can be temporarily cleared by using any of the buttons on the turn signal lever. Urgent ones can not be cleared unless the problem is corrected.

You might need someone with access to the service manual to figure it out.

 

[Hulty]

Can you take a pic of your display?

 

[blutrotsonic]

Turns out that it took me forever to search through the owners manual to find the right section 'Vehicle Messages'. In that section it says code 77 is 'Service front Camera System'. My 2014 has the advanced safety package and after reading this I did notice it was not functioning. Other codes are for example code 89 'Service Vehicle Soon'. Mystery solved.