Wondered if anyone could provide some assistance on the above vehicle. 2006 Vauxhall Astra Z16XEP with engine management light on and fault code of p0115 Coolant temperature sensor circuit malfunction logged. No apparent running faults present. The customer (a vehicle sales company) have already fitted both the coolant temperature sensors in the thermostat housing and the radiator with genuine vauxhall units. The fault codes were cleared at that point but after a 60 mile trip the fault has reoccurred with the same fault code logged.
I haven't spent time checking wiring continuity as yet but have checked live data and both sensors appear to be reading and rising with engine temperature. I was just wondering if anyone had come across this as a common failing (ie electrically controlled thermostat failing intermittently or other known fault?)
Any help/advise gratefully received