Diagnostic Trouble Code
P0131
Oxygen Sensor Circuit Low Voltage (B1S1)
Technical Description P0131
Oxygen O2 Sensor Circuit Low Voltage (Bank 1, Sensor 1)
What Does This Mean P0131?
This diagnostic trouble code (DTC) is a generic powertrain code, which means that it applies to OBD-II equipped vehicles. Although generic, the specific repair steps may vary depending on make/model.
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.
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.
Possible Causes P0131
1
Faulty o2 oxygen sensor
2
Short to voltage on O2 signal circuit
3
High resistance or open on O2 signal circuit
Solutions & Repair Steps P0131
• Replace faulty sensor
• Repair short, open, or high resistance on o2 signal circuit
• Repair short, open, or high resistance on o2 signal circuit