To the right of the rotary climate controls you will see a vertical 'grille' about 4cm x 1cm. In the lower part of the grille is an aperture where the air is sucked past the sensor by a small fan. In my car the fan is not rotating setting the 2 leds to blink for 20 seconds after starting the car. I will soon pull out the sensor/fan unit and investigate further. By the way there was a 'blob' of fluff behind the grille at first and I thought by removing it the problem would be fixed. Had to hook out the fluff with a paper clip. However the fan still does not rotate even though it tries to a couple of times before the lights start blinking again.
Good luck with yours. - Phil
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'98 N/A S70 145,200Klm
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