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Display group 034, lambda control - diagnosis of lambda probe ageing > < Display group 033, lambda control (lambda learned values)

Octavia Mk1

Analysis of display group 033, display field 2 - lambda probe voltage upstream of catalytic converter
   
Analysis of display group 033, display field 2 - lambda probe voltage upstream of catalytic converter
Readout on -V.A.G 1552 -Possible cause of faultRectifying fault
above 5.000 V
t  Line short-circuit to positive in the line from the engine control unit to the lambda probe
t  Lambda probe defective
–  Check lambda probe wire upstream of catalytic converter → Current flow diagrams and Fitting locations
–  Replace lambda probe upstream of catalytic converter
below 0.130 V
t  Line short-circuit to earth in the line from the engine control unit to the lambda probe
t  Lambda probe defective

   

Display group 034, lambda control - diagnosis of lambda probe ageing > < Display group 033, lambda control (lambda learned values)