Error 4SNS/1/40000000: VDOR-18.825

I ran an Apple Hardware Test with the following results: Alert! Apple Hardware Test has detected an error. 4SNS/1/40000000: VDOR-18.825

Does anyone know what this error is related to? And... is there a known resolution or is it truly a hardware problem that requires service by an authorized dealer. My extended warranty is expired so I'm hoping it's something that'll be easy or at least inexpensive to resolve.

Thanks!