HO2S Heater Control Circuit Low

Diagnostic conditions 

• Battery positive voltage between 10 V and 16 V
• Engine running

Possible cause of fault 

• Short circuit to ground in triggering wire
• Corrosion in connector
• Oxygen sensor faulty
• DME control module faulty

Affected terminals 

DME control module, connector II, pin 1 and oxygen sensor jack after catalytic converter, bank 2, pin 2