bank 1 sensor 1, low voltage

[nickfromboston]

well at auto zone i got 02 sensor and changed it drove for a week then light came on, think it was p0131 "low voltage ,bank 1 sensor 1" i returned it and got new one and it already came back on!!!
what could it be?

[Kitt1993]

bank 1 sensor 1, low voltage

Causes

• Faulty o2 sensor Exhaust leak near the rear sensor
• Plugged catalyst
• Short to voltage on O2 signal circuit
• High resistance or open on O2 signal circuit

Possible Solutions

• Replace faulty sensor
• Repair exhaust leak near the rear sensor
• Check for restriction in catalyst and replace as necessary
• Repair short, open, or high resistance on o2 signal circuit