Bypassing/ignoring low coolant pressure sensor guardian mode?

Looks like I have a coolant/water pressure sensor that has failed and is reading 0 psi at all times.

For some reason this doesn't cause any problems under 1200 rpms.. but above it the engine goes into guardian mode and wont run at high rpm.

The water TEMP is a steady 145 - 160 and it's a freshwater cooled engine..

The problem is the repair place it needs to go to today or tomorrow is a MUCH LONGER trip at 1100 rpm vs 4000.

Is there any way to tell the computer to ignore this sensor? I imagine this isn't the kind of sensor you can just unplug... because it NEEDS to get some kind of pressure reading..

It's on a 383 stroker FWC mercruiser motor.. thank you for any help!

 

That would be the easy way.. the problem is I'm on an island and parts will take a while.. was hoping to bring it to the painting place today. If not tomorrow will have to suffice. Looking at car parts as a temp solution now.

 

Temp sensor is fine. Need the pressure sensor..

 

Yeah, prob can't pull that off today. Will this one work as a temp solution? https://www.napaonline.com/en/p/ECHOP6719?impressionRank=1

 

If I just unplug it, will it give the beep every 2 mins? I saw a post that someone had to do that when they were 25 miles out to sea.. That would be fine... the part that isn't fine is 1200 rpms and blaring constant beep.. might just have to try that..

 

One other weird data point. The code is not thrown when in N - it will run at 2k rpms as normal with no code thrown.. but the moment you try and do it in gear it throws it.

Neutral position sensor and drive oil lube level sensor can be disconnected and the same thing happens.

The coolant pressure sensor shows zero psi in Vessel view, which is why I'm focused on that one. Why would it make a difference if it was in N or FWD ?

 

Thank you for your post and the video. Saved the day.. dropped it into a cup of salt terminator x and 10 mins later we had a working boat!!

Going to order the correct part and move on.. super quick save though and much appreciated!!