P0130O2 Sensor Circuit Bank 1 Sensor 1
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- The oxygen sensor before the catalytic converter on bank 1 (sensor 1) is the main control sensor for the mixture. It is either a switching sensor (about 0.1 V lean to 0.9 V rich) or a wide-band sensor that works with a pump current evaluated by an interface chip. P0130 is the general circuit code, and manufacturers fill it very differently. Ford used it up to 2010 as the collective code for all wiring faults reported by the wide-band interface chip and has split it into specific codes since 2011. Subaru sets it when the interface voltages leave their range for 5 s, with immediate MIL. GM calls it 'closed loop performance': cross-talk from the heater (signal rises above 2 V with the heater off) or disagreement with the downstream sensor, two trips. A stored code usually switches mixture control to open loop and suspends adaptation and converter monitoring.
- What you may notice
- Check engine light on
- Higher consumption, possibly rough running (no mixture control)
- Higher emissions, possible emissions test failure
- Sensor and catalyst readiness not set
- Likely causes
- LikelyWiring or connector of the bank 1 upstream sensor damaged, corroded or wet
- LikelyOxygen sensor faulty internally
- PossibleExhaust leak ahead of the sensor or mixture fault (plausibility versions)
- RareWrong or aftermarket sensor type
- RareControl module or sensor interface chip faulty
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €60 – €350
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.