Checking Oxygen Sensors For Interchanged Plug Connections

Checking Oxygen Sensors For Interchanged Plug Connections
This test module serves the purpose of checking the oxygen sensors for interchanged plug connections.

Effect:
The vehicle emissions are increased to impermissible levels.

Possible Customer Complaints:
MIL lamp ON

Procedure:
When work is carried out on the exhaust system that requires the plug connections of the control and/or monitor sensors to be disconnected, this test module must be carried out on completion of this work.

Necessary Test Conditions:
- Engine running at idle speed
- Coolant temperature > 80° C
- Catalytic converter temperature > 320° C
- None of the following fault codes entered in the DME fault code memory:
Fault locations Fault description
(19) 25 Activation of oxygen sensor heating before catalytic converter, row 1
(37) 55 Activation of oxygen sensor heating before catalytic converter, row 2
(3D) 61 Activation of oxygen sensor heating after catalytic converter, row 2
(4F) 79 Activation of oxygen sensor heating after catalytic converter, row 1