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Engine control unit > < Removing and installing Lambda probeG39 with Lambda probe heaterZ19

A4 Cabriolet Mk2

Removing and installing exhaust gas pressure sensor 1G450
Removing and installing exhaust gas pressure sensor 1 -G450-
Exhaust gas pressure sensor 1 -G450- is only installed on vehicles with particulate filter.
Exhaust gas pressure sensor 1 -G450- is connected via two pipes -arrows- to the take-off points upstream and downstream of the particulate filter.
   
Exhaust gas pressure sensor 1 -G450- detects the amount of deposits in the particulate filter.
Removing
–  Before disconnecting, spray the two hoses coming from exhaust gas pressure sensor 1 -G450- with suitable release agent.
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–  Carefully pull the two hoses off their connections (take care to keep the hoses straight; the connections can easily break off exhaust gas pressure sensor 1 -G450-).
–  Detach electrical connector from exhaust gas pressure sensor 1 -G450--1-.
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–  Unscrew the two bolts and remove exhaust gas pressure sensor 1 -G450-.
Installing
–  When installing, note the following:
t  Tightening torque for exhaust gas pressure sensor 1 -G450-: 3.5 Nm
  Note
t  Before installing, blow out hoses for exhaust gas pressure sensor 1 -G450- towards particulate filter with compressed air (hoses can become obstructed or may ice up due to condensation).
t  Make sure that hoses are securely fitted and seal properly.
t  If pressure connections are detached from particulate filter, tighten to 25 Nm.
Adaption must be performed after renewing exhaust gas pressure sensor 1 -G450- and/or particulate filter. (The procedure is described under Guided Functions.)
Select correct vehicle identification in Guided Fault Finding.
–  Press „Go to“ button.
–  Press „Function/component selection“.
–  Select „Drive train“.
–  „01 - Self-diagnosis compatible systems“
–  „01 - Engine electronics“
–  Select „01 - Functions“.
–  „01 - J623 Adapt particulate filter learned values“
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Engine control unit > < Removing and installing Lambda probeG39 with Lambda probe heaterZ19