bmw x5 e53 actual intake air temperatur error?

[Derpsi]

Hello sorry for wierd title but i have carly and ive gone to live monitoring and the actual intake air temperatur reading is well quite off and i dont know where that sensor is and what part to order to replace it, look at photo to see what i mean.

i want to get this fixed so that i can finaly get some heating inside the car as its about -20 celsius at north of norway and with these freezer of a car its not pleasant to drive 250 km to visit another city :S

[80stech]

Intake air temperature usually means the engine intake manifold (sensor is in the center of the manifold on M54). Maybe get a better code description, engine,year, heating system and what the symptoms are.

[Derpsi]

carly dont give better code description on what i know off.
engine is M57N

[wpoll]

Originally Posted by Derpsi

carly dont give better code description on what i know off.
engine is M57N

On the M57N, the charge air temp sensor (B2012) is on the output pipe of the intercooler, about halfway up the pipe to the intake manifold inlet (EGR).



It's prone to oil contamination.

[Clavurion]

And the intake air temp sensor is implemented in MAF. I wouldn't rely on Carly regarding this information.

Have you checked coolant temps with diagnostics or from cluster hidden menu? Failing thermostats is one culprit on these. The running temp should be near 90 C (main thermostat is 88 C). Is your Webasto still working as it helps massively getting to running temp on cold climate.

[Derpsi]

Originally Posted by Clavurion

And the intake air temp sensor is implemented in MAF. I wouldn't rely on Carly regarding this information.

Have you checked coolant temps with diagnostics or from cluster hidden menu? Failing thermostats is one culprit on these. The running temp should be near 90 C (main thermostat is 88 C). Is your Webasto still working as it helps massively getting to running temp on cold climate.

so i need to change the entire MAF=?
the webasto is running non stop when engine is on.
engine is beeing cooled all the time since that actual intake air temperature is so high so the engine dont get hotter than 50-53

[80stech]

Yikes ! I think you should probably take it to a shop that works on BMW.

[Clavurion]

Stop thinking about that intake temp reading. Even if it was faulty MAF (intake temp sensor) or boost temp sensor they have nothing to do with engine coolant temp. Renew the main thermostat (BMW original only) and EGR thermostat (OEM or Behr/mahle is OK) if you have one (EU4 version). With those temps Webasto will be running all the time. It drops out when coolant temp rises above 75 C.

[wpoll]

Originally Posted by Clavurion

Stop thinking about that intake temp reading. Even if it was faulty MAF (intake temp sensor) or boost temp sensor they have nothing to do with engine coolant temp. Renew the main thermostat (BMW original only) and EGR thermostat (OEM or Behr/mahle is OK) if you have one (EU4 version). With those temps Webasto will be running all the time. It drops out when coolant temp rises above 75 C.

FWIW...

A failed-open thermostat is both likely and catastrophic in terms of the engine getting up to the proper temperature.

[80stech]

Maybe the OP found the answer is was looking for on FaceBook!