Technical Description
The voltage of the Oxygen O2 Sensor Circuit is too low (Bank 1, Sensor 1).
What does that mean?
This diagnostic trouble code (DTC) is a generic powertrain code, which applies to OBD-II equipped vehicles. Although it is a generic code, the specific repair steps may vary depending on the make and model of the vehicle.
Essentially, a P0131 code is the same as P0136 and P0137, and it refers to the first oxygen sensor on Bank 1.
P0131 indicates that the voltage of the O2 oxygen sensor remained low for longer than 2 minutes. The Engine Control Module (ECM) interprets this as a low voltage condition and activates the Malfunction Indicator Lamp (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 illumination of the Malfunction Indicator Lamp (Check Engine / Service Engine Soon).
Causes
A code P0131 may indicate that one or more of the following has occurred:
