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Vauxhall Workshop Service and Repair Manuals

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Diagnostic Information and Procedures > < DIS Ignition Module, Remove and Install (X 25 XE, X 30 XE)

Omega B

Stereo Oxygen Sensor Loop

 

The stereo oxygen sensor control consists of two separate oxygen sensor circuits, which regulate the carburetion for the left and right cylinder banks.

 

 

1     Oxygen sensors

 

 

Object Number: 2387474 Size: DEFAULT

 

 

Function:

 

The oxygen sensors measure the oxygen content of the left and right cylinder banks.

If, for example, the mixture in the left cylinder bank is too rich (too little oxygen) and the mixture in the right cylinder bank is too lean (too much oxygen), the separate oxygen sensor circuits regulate the mixture leaner for the left cylinder bank and richer for the cylinder bank.

 

·    Service

 

If O2 sensor circuits 1 or 2, or the lead between O2 sensors 1 and 2 are defective, or the mixture composition is incorrect, the engine telltale illuminates and a trouble code is stored in the control unit:

 

-      Trouble code 13: O2 sensor 1 lead interruption.

-      Trouble code 38: O2 sensor circuit 1 voltage low.

-      Trouble code 39: O2 sensor circuit 1 voltage high.

-      Trouble code 89: O2 sensor circuit 2 voltage low.

-      Trouble code 91: O2 sensor circuit 2 voltage high.

-      Trouble code 98: O2 sensor 2 lead interruption.

 

In case of a defect, the control unit continues operating with replacement values to ensure that the vehicle can reach the nearest authorized Opel / Vauxhall workshop.

 

Diagnostic Information and Procedures > < DIS Ignition Module, Remove and Install (X 25 XE, X 30 XE)