P0131: Oxygen O2 Sensor Circuit Low Voltage (Bank 1, Sensor 1)

What Does The P0131 Code Mean?

Essentially the same as P0136 and P0137, a P0131 code refers to the first oxygen sensor on Bank 1.

P0131 means the O2 oxygen sensor’s voltage remained low for longer than 2 minutes. This, is interpreted by the ECM as a low voltage condition and sets the MIL. Bank 1 Sensor 1 is located in front of the catalytic converter.

What Are The Symptoms Of The P0131 Code?

There may be no visible symptoms to the driver, other than the MIL (Check Engine / Service Engine Soon) illumination.

What Are The Potential Causes Of The P0131 Code?

A code P0131 may mean that one or more of the following has happened:

• Faulty o2 oxygen sensor
• Short to voltage on O2 signal circuit
• High resistance or open on O2 signal circuit

How Can You Fix The P0131 Code?

• Replace faulty sensor
• Repair short, open, or high resistance on o2 signal circuit

Recommended Parts

Below are some recommended auto parts to help you address the trouble code affecting your vehicle and get it running smoothly again:

>>> O2 Sensor
>>> WORKPRO 582-piece Crimp Terminals, Wire Connectors, Heat Shrink Tube, Electrical Repair Kit
>>> Dorman 86689C 399 PC Automotive Electrical Repair Kit

Note: During the purchasing process, please check carefully whether the part you want to buy fits your car!

Check This Video For Reference

Reference Sources

Diagnostic Trouble Code (DTC) Charts and Descriptions for P0131 – Pages 30-31.