The Lambda Sensor is part of the car Exhaust System system. We have 3 associated problem symptoms connected to it.
We also have 138 owner problems that mention it.
Spanner warning light lit
Erratic running but only between 1.5 and 2.5 rpm
Car Spanner light on start up but clears when engine warmed up
Engine managment light
Rough when idle
Engine mangement light on
Citroen Xsara Picasso