Hi i was having this problem on my p38, i found out that one of the main ecu's operates on a particular frequency which i cannot find. well this frequency is used by some household items. if you sit in the vehicle wen it is locked with the key (superlocked) after a few minutes you will here...

hi heres a site which may help: JTF100270 SENSOR AMBIENT TEMPERATURE | Range Rover P38 1995>: Engine: Cooling | shop | www.lrseries.com | L. R. Series i hope this works for you. hope u get it sorted. stu