P0130
Medium SeverityO2 Sensor Circuit (Bank 1, Sensor 1)
Emissions System
What Does P0130 Mean?
General fault with the upstream O2 sensor on bank 1. This sensor monitors exhaust oxygen to control fuel mixture.
Common Fix
Replace upstream O2 sensor bank 1
Estimated Cost (DIY)
$30 - $100
Symptoms
- ⚠️Check engine light
- ⚠️Poor fuel economy
- ⚠️Rough idle
- ⚠️Failed emissions test
Related Symptoms
Common Causes
How to Diagnose P0130
- 1Check O2 sensor wiring and connector
- 2Monitor sensor voltage with scan tool (should oscillate 0.1-0.9V)
- 3Check for exhaust leaks near sensor
- 4Replace sensor if lazy or stuck
OEM Diagnostic Flowchart
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Related Resources
Repair guides, symptom pages, and wiring diagrams related to P0130.
OEM Manual Evidence
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Related Symptoms
Browse →A check-engine light is a graph entry point into code pages, symptom-specific diagnosis, and the exact repair categories most often associated with those failures.
Rough idle often traces back to ignition, air metering, vacuum leaks, or timing-related faults before it becomes a full misfire complaint.
Exact Vehicle Hubs
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Open the exact vehicle hub for a repair workflow commonly associated with P0130.
Open the exact vehicle hub for a repair workflow commonly associated with P0130.
Open the exact vehicle hub grounded by OEM manual evidence related to P0130.
Open the exact vehicle hub grounded by OEM manual evidence related to P0130.
Open the exact vehicle hub grounded by OEM manual evidence related to P0130.
Exact Repair Workflows
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Open the exact repair flow most commonly associated with P0130 on this vehicle.
Open the exact repair flow most commonly associated with P0130 on this vehicle.
Open the exact repair flow most commonly associated with P0130 on this vehicle.
Open the exact repair flow most commonly associated with P0130 on this vehicle.
Open the exact repair flow most commonly associated with P0130 on this vehicle.
Related Codes
The upstream O2 sensor on bank 1 is stuck at a low voltage, indicating a lean exhaust condition. Could be the sensor or an actual lean condition.
Upstream O2 sensor on bank 1 is stuck at high voltage, indicating a rich condition.
The heater in the upstream O2 sensor on bank 1 is not working properly. The heater brings the sensor to operating temperature quickly.
Frequently Asked Questions
- How do I know if my O2 sensor is bad?
- A good O2 sensor oscillates between 0.1V and 0.9V rapidly. A lazy sensor responds slowly or gets stuck at one voltage.
- Does P0130 affect gas mileage?
- Yes — the upstream O2 sensor is critical for fuel trim. A bad one can cause 10-20% worse fuel economy.
Related Repair Guides
If your vehicle has triggered P0130, these DIY repair guides may help: