Test of lambda probe


This function is used to test the lambda probe before the catalytic converter.

Test prerequisites:

Procedure:

  1. Choose the function: "Lambda probe before catalytic converter".

  2. Press and hold down the brake pedal. The engine control unit increases the engine speed to about 1100-1300 rpm.

  3. The temperature of the catalytic converter must be at least 400 °C.

  4. The diagnostic status field changes from "Test off" to "Test on".

  5. Maintain the engine speed until the diagnostic status field changes from "Test on" to "B1-S1 OK" or "B1-S1 not OK".

  6. Read the oscillation curve of the lambda probe before the catalytic converter. Prescribed value 0.7-2.00.