www.jec.org.uk

Hi all,
Can anyone please tell me what this sensor is called , what it does and the part number? It’s on my x308 4.0 sc, 2001. Located underneath air duct inserted into the intake main plenum I think. It’s the one to the right of the TPS. Small 2 pin plug with clip.
I have “restricted performance “ and suspect it. I tried cleaning the contacts but no luck. Help most appreciated!!

Hi 700 SN,
I think you'll find it's the Intake Air Temperature Sensor. Number 1 in the photo.
Take care and good luck solving the issue.
Andy

Ok Andy thanks a lot.. it’s either the crank breather pipe (clip broken) letting air sucked in after the MAF or this air temp sensor. Or both. I cleaned it up anyhow but ordered another from Jaguar as a precaution. Before and after pics of the cleaned sensor …

That looks clean now .
Good luck tracking down the fault Stu.
Take care.
Andy

It’s difficult to say if it was this sensor (IATS) or , I also noticed a cracked clip on the crankcase breather pipe.
As this also could contribute to air being sucked in to the plenum through a slight gap, and it’s after the MAF, it would increase the airflow telling the ecu to increase the fuel.
Of course a combination of the two would create an over-fuelling effect. This would explain why she was ok when cold but very unhealthy when hot..