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Intake temperature

603 Views 20 Replies 5 Participants Last post by  Kidz147
Does anyone know what and where the sensor is on the Giulia Veloce which measures air intake temp as mine seems to be reading 90degress when this is not the true temp, currently running intake system? Anyone else had any issues with this and have a part number for a replacement and where it is on the Giulia? Any assistance would be appreciated.

It also appears that the fans are running constantly, presume due to the ecu seeing the incorrect temp. Anyone else had this or had to replace the mass air flow sensor as not sure if possible to remove and clean it as it looks like a sealed unit?
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Air Intake Temp Sensors are usually part of the MAF.
Just seen a post on us forums that this could be caused by incorrectly replace water pipes after the aux belt service. Anyone else hear of this?
No water pipes of any type need to be removed/disconnected during the Auxiliary Belt replacement.

See here for how the Aux Belt is replaced, no water pipes touched -

Giulia auxiliary belt replacement
Ahh, that us post might have been on the QV... back to the drawing board with my issue with either sensor issue or could it be a relay issue? Anyone else have any ideas?
I think you've got your temp sensors mixed up.

If the fans are running continuously it could be due to a failed coolant temperature sensor. The ECU interprets the faulty signal from the coolant temperature sensor as the engine being overheated, thus runs the radiator fans a full tilt, trying to cool the engine down.
Could be, although just been to Celtic Tuning and intake temps were reading 90 degrees and the intake pipe was cold so this cannot be correct. I am really stumped and so were they...
In your initial post you stated you measured the intake air temp as being 90 degrees, what diagnostic tool did you use to measure this?
It was at celtic tuning and was plugged into their hardware on their rolling road.
Well there are basically 3 temperature monitoring systems in the engine,
1/ Air Temperature (basically measuring Ambient Air temp)
2/ Boost/Manifold Temperature
3/ Engine coolant temperature.

As I am on the other side of the world I am not familiar with Celtic Tuning and what systems they employ, so all I can suggest is to take it to a independent Alfa specialist with Alfa specific diagnostic software and have all three systems checked out to see which one it is that is causing the issue.

Unfortunately at this range my Psionic abilities start to drop off. ;)
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Well there are basically 3 temperature monitoring systems in the engine,
1/ Air Temperature (basically measuring Ambient Air temp)
2/ Boost/Manifold Temperature
3/ Engine coolant temperature.

As I am on the other side of the world I am not familiar with Celtic Tuning and what systems they employ, so all I can suggest is to take it to a independent Alfa specialist with Alfa specific diagnostic software and have all three systems checked out to see which one it is that is causing the issue.

Unfortunately at this range my Psionic abilities start to drop off. ;)
Appreciate your input Bazz 👍
I'd say that Celtic Tuning are as competent as most Alfa indies in UK. If the boost/manifold temperature sensor is reporting 90C even with a cold engine, it must surely be a duff sensor or the wiring to it.
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Also noted a fault code P1D7F on my fault reader which seems linked to throttle self learn and high intake or water temps? Anyone else seen this code?
Would it be possible to connect the cooling temp sensor connector to the air intake sensor and the air intake sensor connector to the cooling temp sensor thus giving 90 degrees of air temp which is what the coolant temp would typically read.
Would it be possible to connect the cooling temp sensor connector to the air intake sensor and the air intake sensor connector to the cooling temp sensor thus giving 90 degrees of air temp which is what the coolant temp would typically read.
I'm not entirely sure where the air intake sensor and cooling temp senders are?
I'm not entirely sure where the air intake sensor and cooling temp senders are?
It’s a long shot but would be worth identifying where the sensors are situated.
Any chance that your intercooler circuit pump relay is dead? Seems to be a common issue, and there are no warnings triggered when they fail. The ones in the wheel arch.


[edit] Ignore me, if the car is "seeing" high temps but the intake is cold to the touch with the fans spinning then you are right it sounds more like a faulty sensor to me.
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Does anyone think attempting to clean the Maf sensor may have an effect? Anyone else think the maf sensor by the air box also measure intake temps on data logging or is this measured higher up,on the hot side of the engine?
Any chance that your intercooler circuit pump relay is dead? Seems to be a common issue, and there are no warnings triggered when they fail. The ones in the wheel arch.


[edit] Ignore me, if the car is "seeing" high temps but the intake is cold to the touch with the fans spinning then you are right it sounds more like a faulty sensor to me.
I think you could be right about the charge cooler pump not working as ran Alfaobd scan which threw up a U1008 fault code. Any idea where to,purchase the updated charge cooler pump relay and where the relay is located on the car?
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