Hi, welcome to Just answer
Unfortunately I do not have a good news
If you cannot remember the password then there is no Factory By Pass Password ...the only way this unit can be unlocked is by Pioneer Service Center and you will have to contact Pioneer for the nearest Service Center.....
If you have further questions I will be pleased to assist you – please use the REPLY link for further assistance..Please remember to RATE my answer Excellent or Good Service when you are satisfied....Thanks
You can contact Pioneer Service Center at 0330 123 1240 or 0870 600 1539...Monday to Friday between 9.00am - 5.00pm