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• P0137

  P0137

  
  

  Diagnosis information - DME V6 DFI Oxygen sensor behind cat. conv., bank 1

  NOTE: Do not use contact spray on the oxygen sensor's plug connections as this will result in irreparable damage to the lines (blockage of reference air duct).

  
  

  NOTE: Do not interchange the oxygen sensor ahead of catalytic converter with the sensor behind the catalytic converter as this will result in implausible fault entries.

  
  

  NOTE: If the control unit connector [B] is disconnected from the DFI during fault finding or if the power supply is interrupted elsewhere (battery, fuse), teaching of the throttle valve adjusting unit must be performed.

  
  

  NOTE: If the ignition is switched on with the connector [B] disconnected from the DFI control unit, the fault >DFI control unit Timeout< may be entered.

  
  

  Diagnostic conditions

• Exhaust temperature between 350 °C (662 °F) and 800 °C (1,472 °F)
• Battery positive voltage between 11 V and 16 V
• Engine idling for 3,000 seconds after start
• Coolant temperature between 40 °C and 60 °C (104 °F and 140 °F)
• No secondary air
• No secondary air diagnosis
• No tank ventilation
• No tank ventilation diagnosis
• No other faults stored
  
  

  Possible fault causes

• Short to ground in signal line
• Short circuit / contact between lines
• Oxygen sensor faulty (short circuit)
  
  

  Affected contacts on the DFI control unit connector

  
  
  Connector [B]:
• Contact 76
• Contact 77
  
  

  Affected contacts on the oxygen sensor connector behind catalytic converter, bank 1

  
  
  Connector [A]:
• Contact 3
• Contact 4