Have Volvo Questions? Ask a Volvo Mechanic for Answers ASAP
Welcome, I'm Chris (aka Moose) I prefer to work when others don't, I am here around lunch and after dinner till after midnight.working after noon till just after midnight.
What codes now remain?
Is the misfire felt while running?
Was it running flawless prior to you servicing it?
Possible causes for 0040 are going to be O2 sensors removed an installed in the wrong place or bad O2 sensors or incorrect model sensors.
Can you check the compression on cylinder 1 is low and see if the fuel injector is sticking open or being commanded open?
This is my 1st answer, but does not have to be my only answer. You the website and myself expect you to have a great experience with my help. Please let me know if you are pleased by selecting a star rating above or by replying and saying your pleased. Not rating or rating 1-2 stars does not benefit you nor me in any way. Follow up and reply as often and when needed, there is no extra charge to do so.
Hello again Chris here,