2022 oil temperature while towing

[NIsaacs]

Because it’s programmed to give “normal” readings. You’re simply seeing what it’s programmed to show based on other data.

How could it ever show an issue? The truck doesn’t have anything installed to help the computer decide there is an issue. Giving indications of a failure, or impending failure, is impossible for temperature and only total failure indications are possible with pressure.

I just can't see how they could be so smart on one hand and so dumb on the other. If they get enough data to show anything at all, they should get data to show any change.

I guess I just won't ever understand it. It don't make any sense to me at all.

 

[NIsaacs]

It wasn’t the cost of the hardware, it was repeated wasted man hours inspecting trucks with normal oil pressure. The gauge moves rapidly from idle to 1500 rpms, unlike a gas engine, so people were taking their trucks in for warranty claims when it was working normally.

Where are you getting this info from? I have not ever read that except from you. I do about as much reading/research as most, but I don't recall running into this.

 

[AH64ID]

I just can't see how they could be so smart on one hand and so dumb on the other. If they get enough data to show anything at all, they should get data to show any change.

I guess I just won't ever understand it. It don't make any sense to me at all.

That’s the thing, there isn’t anything about those two gauges that is smart. If the engine is at “x” rpm and “y” coolant temp the pressure is “z” and the temperature is “a”. There may be other inputs, such as ambient temp, but it’s just a very very basic algorithm. It’s only able to output what it’s programmed based on other inputs. So a failure in either system won’t change the readings on that system (except if oil pressure drops below 6 psi for 30 seconds).

Simply, the truck would have to have some sort of pressure or temperature sender to give indications of impending failure. We just don’t have those on these engines.

Where are you getting this info from? I have not ever read that except from you. I do about as much reading/research as most, but I don't recall running into this.

Oh man, that’s some old research from when I bought my 05 in 07 and was pissed to learn the oil pressure gauge was fake. I want to say some of it I read on here, and other sites, and I also recall a conversation with some service folks since it was still a relatively new change and they were still flashing late 2nd gen’s to remove the live reading.

 

[BigPapa]

There is no Oil Temp Sensor or Oil Pressure Sensor in your engine. There is an Oil Pressure SWITCH, as John said. It switches on and off at 6psi.

 

[bcbender]

This is a case where I agree with what has been said about the fake gauge and feel compelled to insert my opinion.....

The only thing worse than bad information is misinformation..... The absence of sensors here indicate its on the misinformation side of things... heck my 1970 Chevelle has only the oil pressure "switch" and corresponding light (from the factory) when no pressure the light is ON, seems to be the same thing the Cummins has so they should only have the big red light... As has been said, light on.. damage done, I cannot understand the point in reporting a fabricated value other than the sales guys like to promote features and such....

So therefore in this case they are / can only be fabricating "misinformation" based on no actual data and only tables of assumed values.. better off not having the gauge at all... JM2C...

For what its worth even the old 350s have large variations in pressure based on coolant temp, ambient temp, and RPM.. so I can only imagine how much the 6BT varies.... They ought either delete the fake gauge(s) or include the sensors and allow the end user to monitor (or not) and explain the phenomena better in the OM.

 

[NIsaacs]

There is no Oil Temp Sensor or Oil Pressure Sensor in your engine. There is an Oil Pressure SWITCH, as John said. It switches on and off at 6psi.

I understand that, but so is the ignition, it is on or off. When it is on, all sorts of commotion wakes up. Thats my point, when the oil/temp switch is on who knows what fires up.

I am still convinced it does more than we know.

 

[Ozymandias]

A reason can be to use the same basic dash cluster for all models Gas and Diesel. Instead of a separate one just for the diesel HDs which are a small percentage of the whole line up.

And - Americans love gauges, the more the better.

Check out the dash of a European VOLVO Semi and its counterpart the US built VOLVO.

 

[NIsaacs]

A reason can be to use the same basic dash cluster for all models Gas and Diesel. Instead of a separate one just for the diesel HDs which are a small percentage of the whole line up.

And - Americans love gauges, the more the better.

Check out the dash of a European VOLVO Semi and its counterpart the US built VOLVO.

Yes, my Pete's had a dash like an aircraft.

 

[AH64ID]

I understand that, but so is the ignition, it is on or off. When it is on, all sorts of commotion wakes up. Thats my point, when the oil/temp switch is on who knows what fires up.

I am still convinced it does more than we know.

What do you think the ECM/truck can do besides know that there is 6 psi? It’s a one wire sensor, there is nothing more it can do.

Even if it magically did more, what about oil temp? There is nothing hardware wise on the truck.

It would be great if we had more, but we don’t, we have less than what the truck shows.

This is a case where I agree with what has been said about the fake gauge and feel compelled to insert my opinion.....

The only thing worse than bad information is misinformation..... The absence of sensors here indicate its on the misinformation side of things... heck my 1970 Chevelle has only the oil pressure "switch" and corresponding light (from the factory) when no pressure the light is ON, seems to be the same thing the Cummins has so they should only have the big red light... As has been said, light on.. damage done, I cannot understand the point in reporting a fabricated value other than the sales guys like to promote features and such....

So therefore in this case they are / can only be fabricating "misinformation" based on no actual data and only tables of assumed values.. better off not having the gauge at all... JM2C...

For what its worth even the old 350s have large variations in pressure based on coolant temp, ambient temp, and RPM.. so I can only imagine how much the 6BT varies.... They ought either delete the fake gauge(s) or include the sensors and allow the end user to monitor (or not) and explain the phenomena better in the OM.

At least you can change the gauge to something other than oil pressure and oil temperature on the main page on Gen 4.5’s, it was a hard gauge on my 05 and 18 and that really pissed me off.

 

[NIsaacs]

I am afraid my loader is as bad or worse than my Ram. 65 fuses and 11 relays, everything seems to be electric controlled, very little manual control.

 

[Ozymandias]

I am afraid my loader is as bad or worse than my Ram. 65 fuses and 11 relays, everything seems to be electric controlled, very little manual control.

View attachment 140084

Still better than a 15 year old BMW, 150+ fuses in I believe four different locations.

 

[sag2]

I understand that, but so is the ignition, it is on or off. When it is on, all sorts of commotion wakes up. Thats my point, when the oil/temp switch is on who knows what fires up.

I am still convinced it does more than we know.

If you don't believe its fake, just unplug the wire from the sensor and drive it for a couple days. The cluster will show the same readings with or without the sensor connected.

 

[User113]

For the Gen 3 trucks, the Service Manual states that the oil PRESSURE gauge does nothing more than relay the information from the oil pressure SWITCH, at 6 PSI. (Well, that's what is says bottom line when you ignore all the mumbo-jumbo and read between the lines...) No consideration for engine RPM, temperature or anything.

Does anybody have the ability to look up what the 2022 Service Manual says? Even though the 2022 trucks have vastly more powerful computers, I doubt the oil pressure readings are any more illustrative.

Until we find out more from the source, the safest thing to do would be to think of the oil pressure gauge as a fancy, overly complicated idiot light.

 

[sag2]

22 trucks have a two wire connector, but the ground is blunt cut just off the connector, so it still appears it is a switch.

 

[NIsaacs]

If you don't believe its fake, just unplug the wire from the sensor and drive it for a couple days. The cluster will show the same readings with or without the sensor connected.

I assume this will set off warning lights and codes. Will I be able to clear them afterwords or will it require a trip to the dealer?

 

[NIsaacs]

I Googled "Fake Cummins oil pressure gauge" and found this. The guy says an analog gauge can be fooled but not a digital readout. That digital requires real info.

Copy & paste some of the response:

" And again, that is a Cummins engineering decision. A simple on/off switch is not a sending unit, it's a pressure switch. You cannot apply what Cummins does to other FCA vehicles. Also, IIRC, Cummins changed from a switch back to a sending unit for 2007+ models (last year 5.9 and all 6.7)"

"If the dash readings are the digital read-out then they are showing sensor data, not fake data. You won't find digital readouts for things like temp and oil pressure that are fake, only analog gauges that often times don't tell the full story even when there are proper sensors for them."

"But, if you're looking at the digital readouts you're looking at actual data, not calculations."

https://www.jeepgarage.org/threads/...perature-readings-real.227458/post-2021267864

 

[AH64ID]

I Googled "Fake Cummins oil pressure gauge" and found this. The guy says an analog gauge can be fooled but not a digital readout. That digital requires real info.

Copy & paste some of the response:

" And again, that is a Cummins engineering decision. A simple on/off switch is not a sending unit, it's a pressure switch. You cannot apply what Cummins does to other FCA vehicles. Also, IIRC, Cummins changed from a switch back to a sending unit for 2007+ models (last year 5.9 and all 6.7)"

"If the dash readings are the digital read-out then they are showing sensor data, not fake data. You won't find digital readouts for things like temp and oil pressure that are fake, only analog gauges that often times don't tell the full story even when there are proper sensors for them."

"But, if you're looking at the digital readouts you're looking at actual data, not calculations."

https://www.jeepgarage.org/threads/...perature-readings-real.227458/post-2021267864

He’s wrong and doesn’t know what he’s talking about.

You have seen that it’s a 1 wire sensor, which is a switch.

 

[NIsaacs]

He’s wrong and doesn’t know what he’s talking about.

You have seen that it’s a 1 wire sensor, which is a switch.

My '21 has two wires but sag says one is cut off?

My old Fords and old tractors only use a one wire sensor for oil pressure and coolant. Can one wire work in some instances?

 

[AH64ID]

My '21 has two wires but sag says one is cut off?

My old Fords and old tractors only use a one wire sensor for oil pressure and coolant. Can one wire work in some instances?

You didn’t go back to your post that I linked in post number #12, did you?

That link shows pics of your sensor with only one connection.

There are one wire temperature transducers, but not pressure transducers. If it has 1 wire and is used for pressure then it’s a switch. Pressure transducers usually have 3 wires.

 

[NIsaacs]

Yup, only one connector but two wires. I forgot that. I will go check my mechanical fuel pressure switch on my '01 for wire count.