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Fun, isn't it?
The 141 does not sound good. The rear O2 sensor is not responding, so check the electrical connection and wires going to the sensor. If all looks good, then you will need a new rear O2 sensor - not cheap.
The 410 is probably the relay or water in the pump that froze and will not allow the fan to turn. Relay is not cheap. Drilling a couple of 1/8" holes in the outside of the fan to let water out is cheap.
Turn off the radio, leave the window rolled down and start the car with a cold engine. Listen to the fan, which is in front of the driver's wheel. If it makes noise, good, it is not the relay.
Klaus
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Proud owner of a 220S. If I had more room, I would have more Volvos.
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