Welcome to the forum.
A SenseCode Error is almost always a hardware issue. It can be an issue with the multi-drive/burner itself. It can be an issue with the wiring, or how the multi-drive/burner is set up in the OS. It can be the media, to which you are trying to burn.
Do you have the latest firmware for your multi-drive/burner? If not, go to the mfgr's. Web site, plug in your multi-drive's/bruner's model number, read the instructions on updating/flashing the ROM to apply the firmware update (I always print the instructions out, and follow them 100%), then download and install the firmware.
Check in your OS's control panel, to make sure that the multi-drive/burner is being seen properly.
What brand and type of blank media are you attmepting to burn to?
Has that media ever been used before - are you 100% certain that it's blank?
Good luck, and let us know a bit more please,
As well as what Hunt said about hardware... some software ideas that may help
These notes are (mostly) for Encore, but since the disc burning module inside Premiere Elements is also licensed from Roxio, the steps and ideas are the same for PE
As well as the below, right click the program icon and select Run as Administrator, which is NOT the same thing as running the computer with the Administrator account, and which fixes several "odd" problems... To create a two layer DVD (or a BluRay?), you MUST have Encore set to use the Run as Administrator option
Run as Administrator http://forums.adobe.com/thread/969395
Odd Errors http://forums.adobe.com/thread/670174
Long File Names or odd characters cause problems
And This Message Thread http://forums.adobe.com/thread/665641
Things and Software to AVOID when authoring/burning a disc... says Encore, but also applies to Premiere Elements and disc burning
Start --> http://forums.adobe.com/thread/608660
#2 has WHY Explained http://forums.adobe.com/thread/607390
Create a DVD output ISO file (Encore) or set your DVD output to a folder on your hard drive (Encore or Premiere Elements) and then use the FREE http://www.imgburn.com/index.php?act=download to write files or folders or ISO to disc for DVD or BluRay (send the author a PayPal donation if you like his program)
Thank you for your answer. My gut instinct is that it is the device. I have an HP computer & it usually does updates. As far as the discs I am using they are all brand new and I have had no problems. The disc it got to 99% with tried to play on the media player but was skippy & jerky, especially on the audio.
Firmware will not be updated with OS, or program updates. One must manually "flash" the ROM chip in the device. It is VERY IMPORTANT to read, and fully understand the exact process for flashing the ROM. It can differ device to device, and even with firmware updates for the same device. I always print out those instructions, and check each step off, to make sure that I do everything in the exact and proper order. It is not hard to do, but one MUST follow each step precisely. With my LG and Plextor multi-drives, each has a different set of steps.
As for the blank media, what brand are the discs? All blank media is NOT created equal. I recommend only three brands: Falcon Pro, Verbatim or Taiyo-Yuden. Memorex, recent TDK's and Ritek, all "store brands," any "discount brands," are to be avoided at all costs.
Since you are on an HP, you are most likely running Windows. If so, go to Control Panel>System>Hardware>Device Manager, and look at the DVD/CD ROM drives and look at your multi-drive/burner's Properties - do you see any warnings, or similar?