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| Unplug electrical connector -2- on exhaust gas pressure sensor 1 -G450-. |
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| Remove bolt -3- and detach exhaust gas pressure sensor 1 -G450- from bracket -arrow-. |
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| Detach retaining clips from both hoses. |
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| Before disconnecting, spray hoses coming from exhaust gas pressure sensor 1 -G450- with suitable release agent. |
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| Carefully disconnect the hoses from their connections (take care to keep the hoses straight: the connections on pressure sensor can break off easily). |
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| When installing, note the following: |
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| Tightening torques: Lambda probe - exploded view → Chapter |
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| Before installing, blow out control pipes from exhaust gas pressure sensor 1 -G450- to particulate filter towards particulate filter with compressed air (pipes can become obstructed or may ice up due to condensation). |
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| Make sure that hoses are securely fitted and seal properly. |
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| If pressure connections are detached from particulate filter, tighten to 45 Nm. |
| After renewing exhaust gas pressure sensor 1 -G450- and/or particulate filter, adaption must be performed in order to reset learnt values. The adaption procedure is described in the Guided Fault Finding or Guided Functions; use a vehicle diagnostic tester. |
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