Thread: D4 Fuel Temp Sensor reading negative value

Originally Posted by TopEndThom

Has anyone experience this before? My fuel temp seems to sit around -30deg C when I read the live value with the iiD Tool. I live in Darwin where the average ambient temp is actually about +30deg C this time of year.. ??



I’ve been having issues with a reduced performance and gearbox fault problem on my 2009 2.7 Disco 4. After loss of power at random times, could be cruising on flat road at 100kph or downshifting on a slight rise at 70kph or even cresting a hill and up shifting (but only ever after about an hour or so of driving) I get a low fuel rail pressure code along with a transmission control module communication loss. I’ll write a much more in-depth post about the issue soon (pretty sure I’m up for a HPFP) but for now I’m wondering about this fuel temp reading.. I’m new to the iiD Tool but it looks wrong to me.. do I need a new temp sensor?

Has anyone replaced one?
Common issue?

I haven’t found much about it from this or other LR forums.

Cheers!

Hello. Did you replace the temperature sensor? And did it solve the problem?

Originally Posted by Norway

The engine ecu (pcm) sends out a common 5v line to several sensors, the pcm reads the voltage after each sensor.

thanks that what i thought