[BR3W CITY]

Pending errors aren't real errors, the engine needs to see the same failure a few times before calling them "Active". It usually takes 3-trips (warmup, drive, off) to cycle and clear them, or confirm them.

This is a known thing with the self-powered gauges like the Scangauge. Check the wiring for your diag port, and make sure they scangauge is securely plugged in at both ends. The obdII end can wiggle free, some people like to zip tie it in place.

Its the gauge trying to "read" codes that aren't there. The AAA code and the 800 code are pretty common. Turn everything off, check the connections, try it all again. The codes should either disappear on their own, or allow you to clear them.