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Home >> Porsche >> 2000 >> Boxster Base, Standard >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Cruise Control Systems >> DME 7.2 - 911 CARRERA & BOXSTER >> DTC P0134: Oxygen Sensor Ahead of TWC, Bank 1 - Interruption Of Signal >> Diagnosis Procedure >> Check Wiring Harness

Check Wiring Harness

  1. Remove oxygen sensor connector 1 ahead of TWC.
  2. Switch on the ignition.
  3. Connect voltmeter to pins 3 and 4 of oxygen sensor connector 1 ahead of TWC towards the DME control module.

    Display: approx. 450 mV

  4. Start engine and run at high speed for 3 minutes.
  5. Connect voltmeter to pin 1 and pin 2 of connector towards DME control module.

    Display: battery voltage.

    If the measurement according to items 3 and 5 does not show the specified values, remove DME control module connector and check wiring for continuity.

    If no continuity can be detected, repair wiring harness. If continuity exists, replace DME control module.

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