TEST.....
Well,
there is no crystal ball you can look into so you never fall victom to sensor failure...You know that already..."GRIN" JK
Pretty much the car tests itself redondently all of the time
"In. On"...If any sensor comes back with the wrong answer, or no answer for the computer, then you are gonna get a light "CODE"...If it is a sensor that is failing once in awhile then you have yourself a challenge...But memory codes will be there to track it down...If you are sweatin' your sensors and you wanna wipe your A$$ with some cash, then go replace all of them...And then there is still the chance that you get a bad sensor from the parts shop..So good luck brotha...."GRIN" Mostly playin', but you get the idea...
Nobody seemed to want to reply to your Q, so I thought I would fill ya in...
Cheers