Condition for fault identification

Test condition:

The fault is recognized when the voltage of the oxygen sensor behind the catalytic converter remains consistently too low.

Potential problem source(s):

• Mixture too lean
• Leak in exhaust system on engine-side of catalytic converter
• Defective wiring harness
• Oxygen sensor behind catalytic converter defective
• Defective DME

Terminal condition: none

Voltage condition:

• Onboard electrical system voltage between 9 V and 16 V

Temperature condition:

• Engine warmed to normal temp, above 80 °C

Time condition:

• None

Other conditions:

• Engine on
• Steady-state at low to medium partial load