1999 Volvo S70 car starts then dies and wont restart

PO118 is for a faulty ect sensor signal. You could have a defective sensor or thermostat that is opening to slow or is stuck partially open? Without diagnosing, you could just replace both the thermostat and engine coolant temperature sensor. The thermostat housing needs to be removed to get acces to the sensor so it just make sense to do both. PO1081 is for an immobolizer communication issue and there is no definate repair for this code because it can be something as a bad key all the way to a defective control unit. If the starting issue is happening with both keys then you need to find a good automotive electrician. You would need to cut and solder new terminals for the antena ring connector and the immobolizer control unit connector. You can get the terminals from Volvo. This repair has seem to be working so far. If the starting issue is only with the one key, then you will need to order a new key and have it programmed. As for the last code, most likely it will be related to the stalling after it starts. Keep me posted and if you have any questions on the advise I am giving you, just go ahead and ask or send me a private mesage.

Have you tried the repairs I have mentioned on the previouse post?