'04 RXP 215. Oil light with P1690 code. Help!!!

[Lvanvolken]

I was out riding when the oil light cam on and beeping sounded. Turned it off and it started back up fine. It does it again as soon as I go above 3800 rpm's. As I explored online, everyone said it was very common and that an oil pressure sensor should fix it. That didn't do it. I also changed the oil and filter. No difference.
I've read some people saying that there are two oil sensors. I changed the one on the front of the motor. Where is the one at the aft end of the motor?

 

[skiasylum]

Underneath the oil filler tube and cap. Remove throttle body to gain access.

 

[Lvanvolken]

Underneath the oil filler tube and cap. Remove throttle body to gain access.

The oil filler tube and throttle body are on different ends. I removed the throttle body (aft end of motor) and I didn’t see any type of sensors. The sensor I already replaced (fwd end of motor), was up by the filler neck.
I guess what I need to know for sure is if there are definitely 2 oil sensors.

 

[skiasylum]

I’m guessing you don’t have the service manual for your ski.

420856538 engine block diagram

There are two oil pressure switches listed in the 04 rxp parts diagram.

Engine block and oil separator diagrams.

Engine block one is starboard back