With Manufacturer's Scan Tool

Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC), Checking

Special tools and workshop equipment required







- VAS 5051 Vehicle diagnostic, testing and information system
- VAS 5051/1 Adapter

Requirements
- Coolant temperature at least 80 degrees C.

Work sequence
- Connect vehicle diagnostic, testing and information system VAS 5051 and select vehicle system "01 - Engine electronics" in selection. Engine must be run at idle.







Display on VAS 5051:
- Under -1- select diagnostic function "04 - Basic setting".







Display on VAS 5051:
1. Enter display group
- Enter "043" for "display group number 043" in field -2- and confirm entry by pressing -Q- button.







Display on VAS 5051:
- Activate basic setting by pressing -A- button.
- Press accelerator and brake pedal simultaneously; engine speed increases to approx. 2300 rpm.

Conditions
- Accelerator and brake pedal pressed simultaneously, engine runs at approx. 2300 rpm.

- Check indication in display group -4-.







(Cont.)
If specification in display field 4 is not obtained:
- Perform test drive to free oxygen sensor from any possible residues and repeat test.

If specification in display field 4 is not obtained even after a test drive has been performed:
- Replace Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) -G130-.