Site: PNC BankUnable to log into the PNC Website to pay my mortgage. I am getting the following message. RETURN CODE: P90009999 Add new comment Comments Any time I try to log in on a Google Chrome browser I get this error message. RETURN CODE: P90009999 reply Add new comment Your name * E-mail * The content of this field is kept private and will not be shown publicly. Comment * Notify me when new comments are posted fZaz74 Enter the code above * Enter the code without spaces.