(Car particulars & history posted at end for reference) So after about a year in storage, and a fresh new 12V battery, started up fine (on IMA) with clean (no) DTCs or any other issues, IMA level was down, but recharged nicely. After several days of use & a few dozen miles, persistent MIL &...

Anyone have thoughts on what could cause this light to go on with my 2000 MT Insight?? My problems started after having spark plugs installed at non-Honda shop.. mpg cut in half, sluggish after installation. I had Honda look at it. They said wrong plugs were installed, but no codes showed up...