Also found that "Leakage air through throttle blade" was running 4.60. Is this normal?

Hello. I'm new to the forum and excited to have our 2009 C30 with 100K miles. When I bought the car, the PCV diaphragm was ripped and a lean code was coming up on the scanner. I replaced that while barely driving the car with the dipstick pulled. That is all fixed. But now, I got a 400D code signal ...