I believe that that model has a built in obd. It is a little black box under the hood behind the wheel well. when opened you should see a small led and 5 slots for connection. For more information you will need to find out the way to test it and its fault codes.
YES
under the dash in the center console, it's big and red.
how do you reset engine light on 1991 volvo 240
long answer: yes
no
replace ign sw on 1991 volvo 240
DoT 4
well compare them after you take them out becaue sometimes they have different connections and if they do then you have to switch the plugs to make them fit.
The weight of a 1988 Volvo 240 sedan typically ranges from about 2,800 to 3,000 pounds, depending on the specific model and options. This weight includes the vehicle's body, engine, and standard equipment. Variations may occur due to different configurations, such as the presence of additional features or modifications.
VERY CAREFULLY.
60-90Psig
There is a sticker on the core support that has it. Or, Haynes manual