Hi,
You are correct about the codes. Both deal with the upstream oxygen sensor. The sensor may be faulty, a wiring or connector issue, or a few other things.
Since you heard a rattling sound, that could be related to the catalytic converter as well. If the internal components are no longer attached, they can rattle and in the correct position, restrict air flow. That can cause a power loss and skewed o2 sensor readings.
Take a rubber mallet and tap on the exhaust to see if you can recreate the sound. If you can't check close to the front portion of the exhaust to see if that is where the sound comes from.
Next, because this vehicle is only a couple years old, please keep in mind the oxygen sensors and catalytic converter are both covered under the federal emissions warranty. Many components have an 8 year or 80K mile warranty. You should contact a dealership to see what they tell you. It may be a repair under warranty. (See pic below)
Also, at 48K miles, the spark plugs are not in need of replacement.
Let me know your thoughts.
Joe
See pic below.
Image (Click to make bigger)
SPONSORED LINKS
Thursday, September 26th, 2024 AT 3:35 PM