Technical Description
The oxygen O2 sensor circuit on Bank 2, Sensor 1 is experiencing low voltage.
What does that mean?
This diagnostic trouble code (DTC) is a generic powertrain code that applies to OBD-II equipped vehicles. While it is a generic code, the specific repair steps may vary depending on the make and model of the vehicle.
A P0151 code is essentially the same as P0136, P0137, and P0131. It indicates that the first oxygen sensor on Bank 2 has a low voltage condition that has persisted for more than 2 minutes.
The ECM interprets this as a low voltage condition and triggers the MIL (Malfunction Indicator Lamp) to illuminate. Bank 2 Sensor 1 is located in front of the catalytic converter.
Symptoms
There may not be any visible symptoms for the driver, except for the illumination of the MIL (Check Engine / Service Engine Soon) light.
Causes
A P0151 code may indicate one or more of the following:
