Diagnostic Trouble Code (DTC) Information ECM-216D

Condition 

The control module receives information from the heated oxygen sensor (HO2S) (bank 1) about the fuel / air mixture when idling and at both the lower and upper part-load range. If the fuel / air mixture deviates from λ=1, the short-term fuel trim will compensate for this by adjusting the injection time so that λ=1 is achieved. When the short-term fuel trim makes an adjustment, the integrator median must be adjusted by the long-term trim. The diagnostic trouble code (DTC) will be stored when the long-term trim must be adjusted almost to maximum in the idle range.

Substitute Value 

• None.

Possible Source 

• Intake air leakage
• High fuel pressure
• Leaking injectors
• Damaged mass air flow (MAF) sensor
• Contaminated engine oil
• Oil level too high
• Damaged heated oxygen sensor (HO2S) (bank 1).

Fault symptom[s] 

• None.