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Discussion Starter #1
Just thinking that does 2003 saab 93 B207R has got somekinda lambda fuse for downstream sensor. Cluldnt find
 

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upstream (afr)
downstream (cat efficiency)

neither are wideband sensors
 

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Discussion Starter #3
So if i get code for secondary sensor heater circuit low there is no point for looking to any fuses?
 

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Sounds like rear went bad.

Bosch #16624
 

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Discussion Starter #7
It all started afyer they changed somekinda turbo oil piping at workshop. Should i consider checking wires? If so how could i check it with lets say multimeter but without removing sensor from exhaust
 

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I would start with visual inspection first. After that if all looks good use a multimeter and check continuity.
 

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Discussion Starter #9
Also could i buy an used lambda that has 197060 km on it. New one costs like 50 euros and used one 15 euros
 

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Yes you can, but I do not recommend that.
 
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