Engines / Petrol / ME 7.5 general / Test - Lambda-sensor upstream of catalyst - correction

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Mark	Model	Control unit	Diagnostic operation

Mark

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Model

Control unit Select the desired control unit as accurately as possible. The UDS identifier EV_xyz can be found in the VCDS after connecting to the control unit and then in the Extended Identification.

Select the desired control unit as accurately as possible. The UDS identifier EV_xyz can be found in the VCDS after connecting to the control unit and then in the Extended Identification.

Diagnostic operation Select the desired diagnostic procedure.

Diagnostic procedure

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Conditions:
- exhaust system - tightness of line - OK
- engine speed = idling
- engine temperature > XX °C

connect with the control unit XX - engine

XX - Measured values group XXX

required values
field X = -X,X% - + X.X% (lambda control - corrective value)

if values are not achieved, check part:
- lambda control - learning value
- lambda control - values
- lambda control - voltage

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