it's on the radiator, just pull the wires and unscrew it.
Which sensor ???
I have a 240 and with the knock sensor unplugged it will still start so I would have to say no.
Connected to the intake air duct.
met poep
on top of bellhousing, behind head, pass-side
O2 sensor/leaky injecters/fuel pressure regulator.
it is located on top of the bell housing behind the engine
To replace the O2 sensor on a 1993 Volvo 240, first, locate the sensor, which is typically found on the exhaust manifold or downpipe. Disconnect the electrical connector and use an O2 sensor socket or wrench to unscrew the old sensor. Install the new sensor by threading it into the same location, tightening it securely, and then reconnecting the electrical connector. Finally, start the engine and check for any error codes or issues.
under the dash in the center console, it's big and red.
long answer: yes
Yes the 240 does have fuses. Was that your ?.
how do adjust timing belt on a volvo 240 DL ?