Broken o-ring on tbi need help 2001 QX4

[bmack99]

So i had to change the coil on the #4 cylinder but the TBI is in the way so I thought I might have enough room if I removed the sensor right above the coil (it has 2 slotted screws holding it into the TBI unit) but when I removed it the o-ring was compromised (broke) and though doing some searching I don't know which sensor this is and don't know if the o-ring is available separately. There is a code showing but i have not looked it up.
Thanks to anyone who can help. My coil works great! The idle is the s*** now..... :-(

[bmack99]

The codes are P1130 and P1140