Diagnostic Trouble Code (DTC) Information ECM-248D

Condition 

Fig 1: Front Heated Oxygen Sensor

Courtesy of VOLVO CARS CORPORATION

The diagnostic trouble code (DTC) is stored if the engine control module (ECM) registers that there is a short-circuit to supply voltage or a short-circuit to ground in the signal cables for the front heated oxygen sensor (HO2S).

Substitute Value 

None.

Possible Source 

• Short-circuit in the signal cables
• Damaged front heated oxygen sensor (HO2S).

Fault symptom[s] 

• Malfunction indicator lamp (MIL) lit.