Help with code 28A0 on N55

[Racermp]

Update on 28a0. I changed my crank seal. The original looked ok, but when it took it out after tons of pain staking tries then finally hiring a mobile mechanic to use brute Force, the inside seam seems hard and plasticy. So maybe it was almost on its way out at 85k.

Code has gone away now after new seal. Seems all go so far as to driving 20 miles. 0 codes. Thanks alot for your guidance. Hope this helps others