Question about 2004 Chevrolet Silverado
I P0340 means that the rear cat is either switching too fast or not at all
more often then not this is a result of an exhaust leak or a bad O2
However, in your case, with the vehicle running real bad I am going to assume that your cat is bad
to confirm, simply disconnect your exhaust after the front o2's and retest
if your truck runs great then its time for a new cat
Let me know if you need any further help and/or assistance discarding the bad cat
Posted on Jun 03, 2010
PO340 indicates a problem was detected in the camshaft position sensor circuit. Since it says circuit, that means the problem could lie in any part of the circuit. The sensor itself, the wiring, or even in the PCM. A code PO340 could mean one or more of the following.
Posted on Jun 02, 2010
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Feb 12, 2015 | 2004 Chevrolet Avalanche
May 13, 2014 | 2004 Dodge Stratus
Jun 24, 2013 | Cars & Trucks
Apr 18, 2017 | 2011 Chevrolet Camaro
Aug 30, 2011 | 2003 Chevrolet Suburban 1500
Oct 16, 2010 | 2004 Chevrolet Impala
Jul 08, 2010 | 2004 Chevrolet Aveo
Jun 07, 2009 | 2004 Chevrolet Suburban
May 27, 2009 | 2004 Chevrolet Suburban
Jun 30, 2008 | 1997 Nissan 200SX
52 people viewed this question
Usually answered in minutes!