So, just did a rear differential service, along with a pcv valve and vvt solenoid gasket that was weeping a little oil. After performing these services and driving down the road a bit, just about every light lit up on the dash. I'm assuming this happened because the solenoid had to be disconnected to chance the gasket? I disconnected the battery for a few minutes and it went away. When I started the car this morning all of the lights came back on. Should I try disconnecting the battery for say 10-15 mins to try to reset everything? I don't own a code reader, but I have access to one if this doesn't clear it up. The vehicle never went into a limp mode and everything seems to be working properly. I think the ECU is a little angry at me for disrupting things, who knows?