[bryce-o]

So I'm trouble shooting an issue on my 335is and coming up empty handed. My temperature gauge (outside temperature) is reading about 40 degrees outside. Consequently, my oil temperature gauge is reading about 30-40 degrees below normal operating temperature. I'm under warranty still and can take it in for service, just wanted to trouble shoot ahead of time. Thanks for any insight.

[Mike@N54Tuning.com]

Originally Posted by bryce-o

So I'm trouble shooting an issue on my 335is and coming up empty handed. My temperature gauge (outside temperature) is reading about 40 degrees outside. Consequently, my oil temperature gauge is reading about 30-40 degrees below normal operating temperature. I'm under warranty still and can take it in for service, just wanted to trouble shoot ahead of time. Thanks for any insight.

Most likely a bad sensor, but odd that two would go out.

Mike

[bryce-o]

Originally Posted by Mike@N54Tuning.com

Most likely a bad sensor, but odd that two would go out.

Mike

Thanks, Mike. I thought the outside temperature had some bearing on the cars performance or operation. Is that not the case?

[Milan]

Originally Posted by bryce-o

Thanks, Mike. I thought the outside temperature had some bearing on the cars performance or operation. Is that not the case?

You are thinking of the IAT (intake air temperature sensor)

[bryce-o]

Originally Posted by Milan

You are thinking of the IAT (intake air temperature sensor)

obviously the iat affects the performance and output, i just thought i read somewhere 4 or 5 years ago that the outside temp has some bearing on those, as well

[musc]

What is your oil temp running? Do you have a T-stat delete?

[Jeff@TopGearSolutions]

Originally Posted by bryce-o

obviously the iat affects the performance and output, i just thought i read somewhere 4 or 5 years ago that the outside temp has some bearing on those, as well

The physical ambient temp does affect performance but the ambient temp sensor has no direct relation to your vehicle adding or pulling power.

[jwebb335xi]

Originally Posted by bryce-o

Thanks, Mike. I thought the outside temperature had some bearing on the cars performance or operation. Is that not the case?

AIT is measured by TMAP, which is connected to the charge pipe.

[bryce-o]

Originally Posted by musc

What is your oil temp running? Do you have a T-stat delete?

my oil temp is running right around 195-200 degrees when fully warmed up. it had been running tick under 250 degrees before my outside temp started showing a wrong temp

Originally Posted by Jeff@TopGearSolutions

The physical ambient temp does affect performance but the ambient temp sensor has no direct relation to your vehicle adding or pulling power.

cool, thanks Jeff

Originally Posted by jwebb335xi

AIT is measured by TMAP, which is connected to the charge pipe.

lol I know this, my 335is is my 4th n54 I've owned. I've had an n54 since 2009.

[bradsm87]

Oil temp is tied pretty closely to coolant temp when fully warmed up, unless pushed hard. This is due to the factory heat exchanger.

Below 32C ambient, the DME targets 104C or 108C coolant temperature depending on driving conditions. Between 32C and 37C ambient, it targets 95C. Above 37C ambient, it targets 90C.

The OP is correct.