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Middle or rear part of the exhaust system - Summary of components > < Pre-exhaust pipe with diesel particle filter - Summary of components

Octavia Mk2

Replacing the exhaust gas pressure sensor 1G450
Replacing the exhaust gas pressure sensor 1 -G450-
The exhaust gas pressure sensor 1 -G450- determines the volumetric efficiency of the particle filter volume. It is connected to the measuring point behind the diesel particle filter via a pressure line and to the diesel particle filter via another control line.
l  If the lines or hoses are clogged with soot, which significantly constricts their cross section, then the sender together with the bracket and the connected hoses must be completely replaced.
  Caution
The exhaust gas pressure sensor 1 -G450- is very sensitive to impacts and leaks.
t  Therefore the hoses of the sender must only be removed if the sender is damaged.
t  Furthermore there is the risk that the hose connections break off when the hoses are removed.
Removing
–  Remove engine cover → Chapter.
   
–  Disconnect plug connection -2- at exhaust gas pressure sensor 1 -G450--1-.
–  Screw out screw -6- and detach bracket -3- with exhaust gas pressure sensor 1 -G450- in -direction of arrow- from the bracket for the additional fuel pump -V393-.
–  Release screw -5- and remove bracket -8-.
–  Slacken the spring strap clamps -7- and detach the hoses from the connection fittings of the exhaust gas pressure sensor 1 -G450--1-.
–  Screw out screw -4- and loosen the exhaust gas pressure sensor 1 -G450--1- from the bracket -3-.
Install
Installation is performed in the reverse order, pay attention to the following points:
  Note
t  Before installing, blow through the pressure lines to the exhaust gas pressure sensor 1 -G450- with air in order to avoid blockages.
t  Pay attention to the tight fit and leaktightness of the connections.
Tightening torques:
t  Octavia II, Superb II, Yeti with engine identification characters CEGA → Chapter.
t  Yeti with engine identification characters CBDB → Chapter.
–  Perform an adaptation after replacing the exhaust gas pressure sensor 1 -G450- → Vehicle diagnostic tester.
The work procedure for the adaptation is described in the „Targeted fault finding“. It is also described under „Targeted functions“.
–  Select the correct vehicle in the targeted fault finding.
–  Press button „Skip“.
–  Press „Selected Functions/Components“.
–  Select „Drive“.
–  Select „01 - Self-diagnosable systems“.
–  Select „01 - Engine electronics J623“.
–  Select „01 - Engine electronics, function“.
–  Select „01 - Erase initialisation values (Rep. Gr. 21 - 28)“.
  S26-0309

Middle or rear part of the exhaust system - Summary of components > < Pre-exhaust pipe with diesel particle filter - Summary of components