2020 Gen 5 V6 block pressure zero

[wheelnut]

Looking for help please, Have a 2020 Cobalt 200s with the Gen 5 V6 4.3 engine, Dash shows block pressure zero psi, have been searching for the sensor that everybody says is at the rear of the engine on the water hose but I believe they are talking about the generation before, as the Gen 5 has no such location. Chatting with dealers is turning out to be painful, contacted a dealer to order a sensor and they say the sensor is not in their system for that engine, so where does the dash get its info

[AsLan7]

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So glad you found us wheelnut.

Sounds like you’re on the right track looking at replacing a sensor with a zero reading on the block pressure.

I’m familiar with the rear one on the hose in the Mercs as well having owned an earlier gen Merc. Have you done a Google search for the schematic for this gen?

And welcome aboard mate.

[wheelnut]

Thanks for the reply, yes have been searching up and down the internet for 3 days now and can't find any wiring diagrams for this Gen 5 engine. I have also looked close up at many photos and paused videos of the engine on a stand or at a show and can't see any sensors that stand out

[Matts19]

Are you seeing this in the 4-1 gauge? Has it ever read correctly? I’m not sure non evc Volvos actually transmit that info to the gauge.

[jhnmdahl]

Per the owner's manual, p. 3-23, there is no water pressure sensor on the Volvo engines that year. It's mentioned under "Block Pressure."

[wheelnut]

Are you seeing this in the 4-1 gauge? Has it ever read correctly? I’m not sure non evc Volvos actually transmit that info to the gauge.

Thanks, It is the 5'' gauge with the 2 buttons on the bottom, i will try to show a photo. Only had the boat a couple of weeks and it didn't show pressure when I got it, but something to putting the boat into limp mode

[wheelnut]

Per the owner's manual, p. 3-23, there is no water pressure sensor on the Volvo engines that year. It's mentioned under "Block Pressure."

Thanks for the info, that's interesting, I wonder why the boat won't pull up onto plane, it only goes about 10 mph WOT with trim down

[wheelnut]

The speed also shows zero when on the water and while pushing hose water up the tube, would this cause LIMP mode ?

[Krob1114]

I didn't realize you could buy a Cobalt in 2020 that still had gauges.