Condition for fault identification

Test condition:

The fault is recognized when the mixture is too lean and must be enriched by more than 25-30%, depending on load factor.

Potential problem source(s):

• Oxygen sensor before catalytic converter defective
• Mass-airflow sensor defective
• Defective injectors
• Intake-manifold pressure sensor defective
• Intake-air temperature sensor defective
• Camshaft position sensor defective
• Defect in high-pressure fuel system
• Defect in low-pressure fuel system
• Intake system leaking
• Oil cap not sealing
• Leak in exhaust system before oxygen sensor behind catalytic converter
• Poor-quality gasoline

Terminal condition: none

Voltage condition:

• Onboard electrical system voltage between 9 V and 16 V

Temperature condition:

• None

Time condition:

• None

Other conditions:

• Engine on
• EVAP not active