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Which sensor ???
60-90Psig
how do you reset engine light on 1991 volvo 240
long answer: yes
under the dash in the center console, it's big and red.
O2 sensor/leaky injecters/fuel pressure regulator.
replace ign sw on 1991 volvo 240
I have a 240 and with the knock sensor unplugged it will still start so I would have to say no.
the 02 senser is on the manifold by the firewall on the passenger side under the hood [ behind and undr the spark plugs]
DoT 4
Connected to the intake air duct.
There is a sticker on the core support that has it. Or, Haynes manual