This is necessary in countries in which there is still leaded fuel.
The vehicles produced for these countries receive the option ’leaded fuel’ ex works. That means that these vehicles are generally equipped with a special catalytic converter. This catalytic converter contains a ceramic element that is given a slightly catalytic coating to enhance its mechanical strength.
The carbon monoxide (CO) emission at idle speed is set by specifying CO adaptation values using the DS tester on vehicles without emission (lambda) control.
The CO measurement is performed at the exhaust tailpipe with an exhaust measuring device.
Observe the following points:
- Ensure exhaust emission test probes do not leak
- Engine at operating temperature
- Engine running at idle speed
- All additional loads OFF (air conditioning, high beam headlight)
- No fault code stored in engine control unit