S80, 1999 - Possessed - HELP???

[Longbow-06]

First off, Hat tip to Matthews Volvo Forum. Excellent source of info by smart folks.

I have a 1999 S80 that I swear is possessed. I have nick-named the car "Christine"

Here is the latest round of problems.

Recently one of the O2 sensors bit the dust, which resulted in the meltdown of a catalytic converter and the untimely demise of the other three O2 sensors.

Now all of that has been replaced, and I am getting the following codes:

P0118
P0103
P0236
P0238
P0452

Nothing has changed other that the cats and the O2 sensors.
I have checked the grounds. Any ideas?

[dcarlson12]

P0118 ECM2000 Engine coolant temperature (ECT) sensor Signal too low intermittent/permanent fault
P0103 ECM-1300 Mass air flow (MAF) sensore Flow too high. Itermittent/Permanent fault
P0236 ECM-170F Atmospheric pressure sensor/boost pressure sensor range check Faulty signal. Intermittent/Permanent fault
P0238 ECM-1600 Boost pressure sensor Signal too high. Intermittent/Permanent fault
P0452 ECM-4020 Fuel tank pressure sensor Signal too high. Intermittent/Permanent fault

If you can get a copy of VADIS you can follow their diagnostic info to try to trouble shoot the above codes. I bought mine off ebay and the cost was only about $20 if I recall.....

[MadeInJapan]

Change the ECT first and see how things are. When the ECT goes, for some reason reports of a Volvo Possession seem to not be too uncommon.