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Home >> Volvo >> 2004 >> S80 Base, 2.5 59, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control Module (ECM) Diagnostic Trouble Codes - 4 Of 11 >> ECM-2910: Front Heated Oxygen Sensor (Ho2S) Preheating, Bank 2. Signal Missing (B6294S2; B6294T; 2002-2004) >> Signal missing >> Checking components and wiring >> Notes
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Checking components and wiring: Notes

Check the resistance of the heated oxygen sensor (HO2S) between terminals #3 and #4.

Check the signal cable between heated oxygen sensor (HO2S) terminal #4 and control module terminal #A70 (#B10). Check the power supply between system relay terminal #5 and heated oxygen sensor (HO2S) terminal #3. Check for an open-circuit.

Remedy as necessary.

Other information 

Fig 1: Identifying Front Heated Oxygen Sensor Connector Terminals
GLL104133Courtesy of VOLVO CARS OF NORTH AMERICA.
Fig 2: Identifying Ohmmeter
GLL101042Courtesy of VOLVO CARS OF NORTH AMERICA.
Fig 3: Identifying Front Heated Oxygen Sensor
GLL102931Courtesy of VOLVO CARS OF NORTH AMERICA.