Technical Description
The Oxygen O2 Sensor Circuit Low Voltage (Bank 1, Sensor 2) is experiencing a decrease in voltage.
What does that mean?
This diagnostic trouble code (DTC) is a generic powertrain code that applies to OBD-II equipped vehicles. The specific repair steps may vary depending on the make and model of the vehicle.
P0137 is essentially the same as P0136 and refers to the second oxygen sensor on Bank 1. It indicates that the O2 oxygen sensor’s voltage remained low for longer than 2 minutes.
The ECM interprets this as a low voltage condition and sets the MIL. Bank 1 Sensor 2 is located at the rear of the catalytic converter and should produce an output signal relative to the oxygen storage capacity of the catalytic converter. This rear sensor is less active than the front sensor. However, if the ECM senses that the sensor is inactive, this code will be triggered.
Symptoms
There may be no visible symptoms to the driver, other than the illumination of the MIL (Check Engine / Service Engine Soon) light.
Causes
A code P0137 may indicate that one or more of the following has occurred:
