O2 Sensor Circuit (Bank 1, Sensor 1)

Where it lives

For P0130, the circuit described runs through the sensor. The description of P0130 puts it on bank 1.

Check these first

• Failed upstream oxygen sensor
• Damaged wiring or connector
• Exhaust leak before the sensor
• Fuel, air, or ignition system causing improper readings
• Contaminated sensor from coolant or oil

What to do next

1. Check for exhaust leaks upstream of the sensor
2. Watch the O2 voltage switch with a scan tool
3. Test sensor wiring and the 5-volt heater/reference circuits
4. Verify the sensor's response against fuel trim data
5. Replace the sensor only after ruling out exhaust and fuel faults

Look up another code