Display Group 040

Heating current of oxygen sensors in front of and behind three way catalytic converter

NOTE:
- The current values specified apply only at when battery positive voltage (B+) is 12-14 volts display group 001, display field 4.
- The heating of the heated oxygen sensors in front of the three way catalytic converter is switched on with the fuel pump relay, i.e. immediately at engine start.
- The heating of the heated oxygen sensors behind the three way catalytic converter is not switched on immediately at engine start, but only when the calculated exhaust gas temperature in the three way catalytic converter exceeds 308°C (586°F) display group 044, display field 2. In order to reach an exhaust gas temperature of 308°C (586°F) in the three way catalytic converter after a cold start, the car must be driven about 20 sec. with an increased engine speed of 2500 RPM.