Engines / Petrol / MED 17.5 CAN general / Test - Lambda-sensor upstream of catalyst - status

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Mark	Model	Control unit	Diagnostic operation

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Select a vehicle make or a common group such as Service Intervals, Engines, Transmissions, Immobilizers and Independent Heaters.

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 (Lambda-sensor upstream of catalyst):
xxxxX = lambda control = active
xxxXx = lambda control = readiness for operation
xx?xx = heating of lambda probe(s)

if values are not achieved increase rpm to XXXX rpm

wait
required values field X (Lambda-sensor upstream of catalyst):
xxxxX = lambda control = active
xxxXx = lambda control = readiness for operation
xx?xx = heating of lambda probe(s)

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