Diagnostic trouble code (DTC) information

Condition

Fig 1: Identifying Front Heated Oxygen Sensor

Courtesy of VOLVO CARS OF NORTH AMERICA.

Diagnostic trouble code ECM-16 is stored if the heated oxygen sensor (HO2S) signal cable short-circuits to ground / voltage or if there is an open-circuit in the circuit that the control module has interpreted as a fault.

Substitute Value

Fuel trim disabled.

Possible Source

Signal too high:

Short-circuit to supply voltage in the signal cable.
Faulty heated oxygen sensor (HO2S).

Signal too low:

Short-circuit to ground in the signal cable.
Faulty heated oxygen sensor (HO2S).
Open-circuit in the signal cable.

Fault symptom[s]

None.