Golf GL L4-2.0L (AZG) (2001)
-
Check Oxygen sensor voltage after catalyst in display zone 1:
Specification: 0.100 to 0.900 V (can fluctuate slightly)
If the display in display zone 1 remains constant:
-
Continue check according to following table.
Possible causes of malfunction if sensor control frequency is too slow:
-
Slots or holes in sensor body are blocked
-
Sensor vent hole in area of connecting wire is blocked
-
Sensor has been overheated (glazed)
-
Sensor has been damaged by leaded fuel
-
Check diagnosis result in display zone 2:
Specification: B1-P2 OK
NOTE: It can take a few minutes until display jumps from "Test ON" to "B1-P2 OK".
If "B1-P2 nOK is displayed:
-
Press -> key.
-
Check DTC memory.
See: Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/Reading Diagnostic Trouble Codes
-
Test drive vehicle to remove possible residue on Oxygen sensor and repeat check.
Observe the valid safety precautions when carrying out a road test.
If the specifications are again not attained:
-
Replace Oxygen sensor (O2S) behind three way catalytic converter (TWC) -G130-.
-
Check DTC memory, if necessary, repair any malfunctions and then erase DTC memory.
See: Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/Reading Diagnostic Trouble Codes
See: Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/Clearing Diagnostic Trouble Codes
Checking basic voltage