Diagnostic trouble code (DTC) information

WARNING: This page is about a different car, the 2004 Volvo S40, 2003 Volvo S40, 2002 Volvo S40, 2001 Volvo S40, and 2000 Volvo S40. However, it is still accessible from the selected car via links, so may be relevant.

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.