Howdy and good greetings. My 1998 Subee has been doing me proud and I feel will go a bit longer...indeed mileage is high (203868) and I've been teaching myself the simple TLC tune up check list, I am now going to try and figure out replacing my spark plugs. New ones are Bosch double iridium,not sure if those will help or harm my pony. Anywho I was hoping a kind soul could lend some knowledge in regards to these codes...much obliged