Hello,

I have an Acura RL 2005 with 70k miles on it. Today morning i filled up gas using 93 at mobile gas station, it was fine i drove for at least 60 miles until later on at night when i start up my car i had this message "check emssion system p0174" and "all wheel drive 77" please let me know why am gettin these message. Thanks.

 

Check out the the garage "sticky" at the top of this forum, it has all the error codes in it. There are also previous threads on this subject. People have reported weak batteries to legitimate sensor failures in the emission system.

 

okay i will thanks.

 

Replace the battery first....