Aging Check

Heated Oxygen Sensors (HO2S) Before Catalytic Converter, Checking Aging

Special tools and equipment







- VAS5051 with VAS5051/1

Test requirements:
- Coolant temperature at least 80 degree C, see display group 004, display zone 3.

Test sequence
- Connect testing and information system VAS5051 and select vehicle system "01 - Engine electronics". Engine must be running at idling speed. Connecting VAS 5051 Scan Tool

Display on VAS5051:







- Under -1 - select diagnostic function "04 - Basic setting".

Display on VAS5051:







1 - Enter display group
- Select function "197" in button field -2- for "display group number 197" and press -Q- button to confirm input.

Display on VAS5051:







- Activate basic setting by pressing -A- button.
- Press accelerator and brake pedal simultaneously, engine speed increases to approx. 2200 rpm.

Test conditions:
- Accelerator and brake pedal pressed simultaneously, engine runs at approx. 2200 rpm.
- Check specifications in display zones -3- and -4-.

Display Group 197:

- Exit function "04 - Basic setting" by pressing <- button.

(Continued)

If specification in display zone 1 and 2 or 3 and 4 is not obtained:
- Perform test drive to free heated oxygen sensors (HO2S) from any possible residues and repeat test.

If specified value in display zone 1 and 2 or 3 and 4 is not obtained, after a test drive has been performed:
- Replace relevant heated oxygen sensors (HO2S) 1 before catalytic converter.