NO I said two plugs were changed. The went with the two Primary circuits that had been chewed..... Those plugs are rated 100,000 miles by the way.
But yes. by all means check them and replace if needed.. The primary issue on my 8.1 was chewed wires
On the much smaller car it was the air filter.
Fortunatally.. I have some training in the diagnosis area
NOTE: Codes can be "Transiant" there is a program for Android (TORQUE) and a devie you plug into your OBD-II (Purchased sepertaly) and it will display AND LOG all codes.
Also the Mobly device from AT&T or T-Mobile or others will send the codes to your Phone as well,.