In the volvo_850_diag_links.html page's section that involves some flashing LED tool links look for the grey background note titled "Parts used to create jonesrh's flashing LED tool". That tool uses a 12V LED that has an in-built 680-ohm resistor. If your LED does *not* have an in-built re...

1. I have *not* seen any Engine ECU DTC codes for Low Oil Level or Low Oil Pressure -- not for 98 S70/V70, nor for 96-97 850. 2. However, I believe the 96-97 850 had the capability to detect Low Oil Pressure and communicate that to the COMBI as a DTC code. That being said, in the ~6-7 years I activ...

I'd guess you most probably have a failing ABS module.