Air & Fuel Mixture ControlOBD2 Codes

P0130 – Meaning, Causes, Symptoms, & Fixes

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Code P0130 Definition

O2 Sensor Circuit Malfunction (Bank 1, Sensor 1)

What Does P0130 Mean?

The P0130 code is triggered when the Engine Control Module (ECM) fails to properly detect activity from the O2 sensor. The O2 sensor transmits a voltage in relation to the amount of oxygen in the exhaust. This voltage is indicated by a value typically between .1 to .9 volts. The value of .1 means the engine is “running lean” and has too much air and not enough fuel. The value of .9 means the engine is “running rich” and has too much fuel and not enough air causing it to run hotter than usual. If the ECM detects that the oxygen sensor is reporting outside of the normal range, this will trigger the P0130 code and eventually affect your fuel economy.

What Are the Symptoms of Code P0130?

  • Check engine light
  • Lower fuel economy
  • Excessive smoke from exhaust
  • Engine stalls/runs rough

*No noticeable adverse conditions in some cases

What Is the Cause of Code P0130?

  • Corrosion/damaged O2 Sensor connector
  • Frayed wiring/connection to O2 sensor
  • Malfunctioning ECM
  • Intake vacuum air leaks
  • Faulty O2 Sensor

What Is the Severity of Code P0130? – Low

This trouble code will not prevent your vehicle from running. The most common result(s) are decreased fuel economy and fuel volatility. However, if left unsolved, this code could eventually damage the catalytic converter, and cause your engine to fail emissions tests.

Code P0130 Common Diagnosis Mistakes

Prematurely replacing the O2 sensor before attempting to visually inspect and test with a scan tool or special equipment, such as an oscilloscope, to ensure the problem has been resolved.

Tools Needed to Diagnose Code P0130:

How to Diagnose and Repair P0130:

Difficulty of Diagnosis and Repair – (1-4)

  1. Check to see if there are any other codes along with P0130 and clear your Check Engine Light with FIXD.
  2. Check the freeze frame data in order to pinpoint the issue.
  3. Conduct a visual inspection of wiring around the O2 sensor for fraying or disconnection.
  4. If the problem persists, consider replacing the O2 sensor.


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  1. Was fixed on september 26, 2018 at Blackstone auto repair on Haines road in Levittown.

    1. Thanks for the information. I think that I’ll have to replace the O2 sensor. In fact, I’m going to replace all 4 02 sensor’s. I’m having problem’s with coolant temperature sensor. It’s hard to locate on my Audi A4, 2004, 3.0 engine. Are the electrical clips color coded. U know like is some of the sensor’s are green, and others are tan or black. Is there a reason why there’s a difference in those colored sensor’s ?

      1. Of you have problem on cts sensor you’ll not authorities to cold start as well as other times the o2 sensor has not any relation with cts

      2. The only known issue im having is my blower motor not wanting to work unless theres pressure on the wiring connecting it to my dash. Im not too car savvy so i have no clue what its called. Its not the plug physically connected to the motor. – ford fusion 2011 hybrid

  2. Have replaced O2 sensor and check engine light came on after only128 miles.

  3. Where is P0130 sensor located?

    1. code p0130 is the 02 sensor bank one sensor one located on the passenger side the one on the top there’s 2 of them on each side the p0130 is the top one on the passenger side

      1. Dean,

        How do you determine which one of the 2 O2 sensors are faulty if I only get a P0130 engine code? I would assume one is the upstream and one is the downstream but which one gives the P130 engine code?

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