What is the p0137 code for oxugen sensor 2?
Code P0137 triggers when the PCM detects that the signal from oxugen sensor 2 on Bank 1 is below a specific value for a certain amount of time. The Bank 1 portion of the code refers to the side where the #1 cylinder is located. There are two O2 sensors in your vehicle.
Where is Bank 1 located on a catalytic converter?
The Bank 1 portion of the code refers to the side where the #1 cylinder is located. There are two O2 sensors in your vehicle. The sensor located before the catalytic converter is the upstream sensor, also known as Sensor 1. The one after the catalytic converter, which is the downstream sensor, is Sensor 2.
What are the downstream O2 sensors on a Nissan?
One or two sensors will be downstream, B1S2 and B2S2. The procedure is similar for the downstream O2 sensors (Bank 1 & 2, Sensor 2). For the downstream sensors, you will find it easier to access the O2 sensor from underneath the car.
How does the O2 sensor affect the PCM?
Upstream O2 sensors (sensor 1) produce varying voltages that enable the PCM to adjust the air-fuel mixture from rich to lean, and vice versa. In contrast, downstream sensors (sensor 2) generate a fairly steady voltage when the catalytic converter is working properly.
What does Bank One of the p0138 code mean?
The bank one portion of the code indicates that the issue is on the side of the engine that houses the number one cylinder (only applies to engines with a ‘V’ or boxer configuration). Since the code is for sensor 2, we know that we’re dealing with the downstream oxygen sensor.
Which is the first sensor in the PCM?
The first sensor (or Sensor 1) is the upstream oxygen sensor that aids the PCM in regulating the vehicle’s air/fuel ratio. Sensor 2, also known as the downstream oxygen sensor, monitors the catalytic converter to check its performance.
When is the O2 sensor signal biased or biased lean?
This post-cat sensor is used for monitoring the efficiency of the catalytic converter. The converter’s job is to reduce emissions out the tailpipe. When the signal from the O2 sensor is detected by the PCM as being stuck lean or biased lean, this DTC is set.
Why is my oyxgen sensor signal stuck lean?
This code is basically telling you that the signal put out by the particular oyxgen sensor is stuck lean (meaning too much air in the exhaust). Note: Some manufacturers such as Ford may refer to this as a Catalyst Monitor Sensor, same thing, different name.
Code P0137 triggers when the PCM detects that the signal from oxugen sensor 2 on Bank 1 is below a specific value for a certain amount of time. The Bank 1 portion of the code refers to the side where the #1 cylinder is located. There are two O2 sensors in your vehicle.
Why is Bank 1 position 3 O2 sensor not working?
Using a scan tool, observe the Bank 1 position 3 o2 sensor. If it isn’t moving between 0.1 and 0.9 volts, increase the engine RPM to a fast idle and then recheck the sensor voltage reading. If it starts switching now, the sensor may be sluggish and/or intermittently going “dormant”.
What causes a p0146 code on a sensor?
Potential causes of an P0146 code include: Bad Bank 1, position 3, o2 sensor Wiring problem, melted harness, broken connectors, etc. Bad PCM
What does the low voltage code p0137 mean?
More specifically, this means that the PCM is detecting a low voltage from the #2 O2 sensor in Bank 1. Code P0137 triggers when the PCM detects that the signal from oxugen sensor 2 on Bank 1 is below a specific value for a certain amount of time. The Bank 1 portion of the code refers to the side where the #1 cylinder is located.