For the P0190 there are only two things that can cause that. Fuel pressure sensor or defective wiring. Check for opens and shorts in the wiring harness.

A sticky or blocked throttle body can cause P2118 which in turn can set P2106. Start with cleaning the inside of the throttle body.

ECM-6805 (P0224) Turbocharger (TC) control valve, boost pressure fault. Pressure too high Diagnostic trouble code (DTC) information Condition Diagnostic trouble code (DTC) ECM-6805 is stored if the pressure measured by the boost pressure sensor is higher than a calculated desired value. This is inte...

Start with things that don't cost anything to check.

Intake air leakage
Exhaust system air leakage
Turbocharger hoses.

You need to have the old CEM software and data cloned to the new CEM. Yes it is done with VIDA or you can send both out and have the cloneing done. If you do send them out to be cloned, mark the old one "Source" and the new one "Destination". Central electronic module (CEM), repl...

Possible source Misfiring Leakage in the intake system Leakage in the exhaust system Faulty fuel pressure Uneven compression Damaged catalytic converter. Take some Ether (starting fluid) and spray it around the intake with the engine running. If there is a intake leak you will hear the engine surge ...

VIDA = V ehicle I nformation and D iagnostics for A ftersales. DiCE = Di agnostic C ommunication E quipment. It is the diagnostics software and hardware used by the Volvo dealerships. You can download the software and a patch to make VIDA work. You can get DiCE clones from may sources including eBay...

I was think yours is a '94.

Option1: You can make a blink code reader for the'96. You can find instructions and a file with the code list here.

Option 2: 850 OBD-II for Android and a ELM327 bluetooth dongle

Option 3: Get a working copy of Vol-FCR and a OBDII to serial or USB cable.

Barnes and Nobel sells a workshop manual that covers the PV544.

Xemodex CEM cloning for that model is $299.00. Cloning is one of them things where ... if you need to ask how, your not qualified to do it.

You have the 2.5L which is mated to a Aisin Warner AW50-50/51. The AW50-50/51 cannot be serviced without disassembly. The picture shows the location of the ATF filter. The bolt next to the large gear is what holds the filter in place.