I hit the dreaded P061B00 tonight. I was driving through some hilly roads tonight and it was pouring rain. Since no one was behind me I'd slow down approaching the hills, send it up hill, coast down, repeat. Well, I eventually threw a P016B00 and everything on the dash lighted up, and it went into the super limp mode, and the exhaust flap sounded like it was locked open. I stopped and cleared it. Threw the code but no reduced power, stopped and cleared it a couple more times, and the last time I parked in a rest area, cleared it, and parked the car a few minutes. The check engine light was still on, UVO still reported a code, but it scanned fine. I got home, cleared it again, then parked it for a while. After about a half hour I went back out, and the check engine light was off. I went out and hammered it off the line, backed off, hammered it (I actually wasn't speeding, just accelerating hard) and was thankful the stock exhaust is relatively quiet as I didn't want to be annoying anyone. I couldn't make it throw the code again.