Diagnostic Trouble Code (DTC) Information ECM-250D

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 the resistance in the preheating circuit for the front heated oxygen sensor (HO2S) (bank 2) is too low.

Substitute Value 

• None.

Possible Source 

• Damaged front heated oxygen sensor (HO2S).

Fault symptom[s] 

• Malfunction indicator lamp (MIL) lit.