Diagnostic Trouble Code (DTC) Information ECM-210A

Condition 

Fig 1: Front Heated Oxygen Sensor

Courtesy of VOLVO CARS CORPORATION

The engine control module (ECM) checks the signal from the heated oxygen sensor (HO2S).

The diagnostic trouble code (DTC) is stored if the engine control module (ECM) registers that the heated oxygen sensor (HO2S) is not activated or is activated too slowly.

The diagnostic trouble code (DTC) can be diagnosed when the engine is running.

Substitute Value 

• None.

Possible Source 

• Contact resistance in the terminals
• Damaged front heated oxygen sensor (HO2S).

Fault symptom[s] 

• Malfunction indicator lamp (MIL) lit.