Here's what they look like after 358k. Yes, it was throwing some code. FYI...the Air/fuel sensor requires a special tool--basically an O2 sensor socket with very thin walls. The codes have been cleared, but my HV battery is now dead...lol.
[QUOTE="FYI...the Air/fuel sensor requires a special tool--basically an O2 sensor socket with very thin walls..[/QUOTE] FYI: Applicable tool is available at Harbor Freight.