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

A3 Mk2

Removing and installing pressure differential senderG505
Removing and installing pressure differential sender -G505-
The pressure differential sender -G505- detects the amount of deposits in the particulate filter.
Removing
–  Remove engine cover panel → Chapter.
   
–  Unplug electrical connector -2-.
–  Remove bolt -3- and detach pressure differential sender -G505- from bracket -arrow-.
–  Detach retaining clips from both hoses.
–  Before disconnecting, spray the hoses for the pressure differential sender -G505- with suitable release agent.
–  Carefully disconnect the hoses from their connections (take care to keep the hoses straight: the connections on pressure sensor can break off easily).
Installing
Installation is carried out in the reverse order; note the following:
l  Tightening torque → Chapter „Lambda probe and exhaust gas temperature senders - exploded view“
  Note
t  Before installing, blow out control pipes from pressure differential sender -G505- to particulate filter towards particulate filter with compressed air (pipes can become obstructed or may ice up due to condensation).
t  Make sure that hoses are securely fitted and seal properly.
t  If control pipes have been released from particulate filter, tighten to 45 Nm.
t  Secure all hose connections with the correct type of hose clips (same as original equipment) → Electronic parts catalogue.
After renewing pressure differential sender -G505- and/or particulate filter, adaption must be performed in order to reset learnt values. The adaption procedure is described in the Guided Functions; use → Vehicle diagnostic tester.
  A26-10722

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