P0130 Code: O2 Sensor Circuit Malfunction (Bank 1 Sensor 1)
🟠 Moderate severity · drivable
Drivable, but the engine may run rich or lean and use more fuel until the upstream sensor is fixed.
What P0130 means
The bank 1 upstream oxygen sensor (before the catalytic converter) isn't producing a usable signal. This sensor is critical for fuel control — without it, the computer can't fine-tune the air/fuel mixture.
Symptoms
- Check engine light is on
- Poor fuel economy
- Rough running
- Possible failed emissions test
Common causes
- most common: Faulty upstream oxygen sensor
- common: Exhaust leak near the sensor
- less common: Wiring or connector problem
- less common: Vacuum leak
How to fix it
| Fix | DIY? | Typical cost |
|---|---|---|
| Replace the bank 1 upstream oxygen sensor | Yes | $60–200 |
| Repair an exhaust leak near the sensor | Mechanic | $50–200 |
| Repair damaged sensor wiring | Mechanic | $50–150 |
Frequently asked questions
Can I drive with a P0130 code?
Yes, but fuel economy will likely suffer. Fix it soon.
What is the most common cause of P0130?
A faulty upstream oxygen sensor. An exhaust leak near the sensor is the other common cause.
How much does it cost to fix a P0130?
Typically $60–$200 for a new oxygen sensor.
Related codes
P0131
P0131 Code: O2 Sensor Circuit Low Voltage (Bank 1 Sensor 1)
P0133P0133 Code: O2 Sensor Circuit Slow Response (Bank 1 Sensor 1)
P0135P0135 Code: O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)
Updated 2026-08. This page is informational and not a substitute for professional diagnosis.