P0131 OBD-II Trouble Code

Technical Description

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

What does that 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.

Symptoms

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

Causes

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

Possible Solutions

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

Need more help?

If you still need help regarding this trouble code, please post your concern in the forums.

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