Error Code P0156: What It Means & What To Do?

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The fault code P0156 can be defined as an O2 sensor circuit malfunction bank 2 sensor 2. It refers to the rear catalyst monitoring O2 sensor which would evaluate the emissions reducing capability of the catalytic converter. This code would start triggering when the rear O2 sensor signal is not showing enough activity to determine fuel control and closed loop fuel management.

The car oxygen sensor would play a very important role in the functioning of the car engine. It makes sure to send the powertrain control module of the oxygen level of the exhaust. This information is then used by the powertrain control module to regulate the amount of fuel in the engine and would maintain a good air fuel ratio as it regulates the amount of fuel released to the engine. If there are some faults in the oxygen sensor, then it can lead to a lot of issues in the car engine.

What causes this problem with the 02 Sensor Circuit Malfunction (Bank 2 Sensor 2)?

• There can be gas leakage in the exhaust
• Air leakage in the intake
• There can be some faults in the fuel injectors
• The wires can be broken or exposed
• The voltage wires or circuits that have shorted out
• Issues with the exhaust holes that are located near or around the oxygen sensor
• Leakage in the engine vacuum
• The oxygen sensor wires may start touching the exhaust

1. Powertrain Control Module - If there is any fault detected in the Powertrain Control Module, then it can flash OBD Code P0156. Replace faulty Powertrain Control Module components now!
2. Exhaust Components - Faulty Exhaust Components will affect the exhaust system and output. Replace faulty exhaust components immediately.
3. Engine Light - Faulty/damaged Engine Light will give rise to P0156. Thus, it is important to replace it immediately.
4. Coolant Temperature Sensor - Are you facing some issues with your Coolant Temperature Sensor? Replace faulty Coolant Temperature Sensor immediately.
5. Fuel Injector - Did your mechanic just found out that there is some fault in the Fuel Injector? Buy top notch Fuel Injector from us at economical prices.
6. Air Intake - Do you remember when was the last time you got your car Air Intake checked up? A damaged Air Intake can cause a lot of issues like displaying P0156 code.
7. Oxygen Sensor Wire - Poor Oxygen Sensor Wire can cause a lot of difficulties, so why not get it replaced at time?

Our main motive is to achieve customer satisfaction and that’s why we will help you to diagnose P0156 code by mentioning some major symptoms below:

Common Symptoms

• The car drivers cannot notice any symptoms that are related to the P0156 fault code. The check engine light can start illuminating which is the most noticeable symptom
• There can be an overall loss in a fuel economy
• There can be an increase of pollutants that are directly emitted into the environment

If you want to correct this fault code, then you must read the points mentioned below:

• The shorted, broken or exposed oxygen sensor wires should be repaired properly
• All the vacuum leaks should be repaired
• You must repair the holes in the exhaust or can always replace the exhaust if necessary
• The fuel injector should be replaced
• The oxygen sensor bank 2 sensor 2 should be replaced

However, if you face any issue then we have stocked a wide range of best priced oxygen sensor wiring, Honda engine light, ntk oxygen sensor and more to help you out in fixing your car.

Here are some ways with which you can easily diagnose this fault code

• Using an OBD-II scanner would help you to collect the trouble codes which have been stored by the powertrain control module
• Then the wiring that would lead to the oxygen sensor should be visually inspected for breaks in the wires or bare wires
• If you want to view the live that, then you must use an OBD-II scanner in order to make sure that the oxygen sensor is in good working condition
• If coolant temperature sensor is not functioning properly, then this code would be stored in by the powertrain control module as well, so make sure that you inspect it and test it properly
• The cases are rare that the powertrain control module can be faulty and that’s why there would be a requirement of advanced diagnosis to make a determination as to whether this is a problem. It should be considered last, and after every possible attempt at repair has failed.

 Common Mistakes When Diagnosing The P0156 Code

• The most common mistake which is made by a lot of people while diagnosing the P0156 trouble code is that they automatically get their car oxygen sensor replaced without actually inspecting other components. The oxygen sensor is not always faulty, and replacing it would not always remedy the issue
• You must consider the condition of wiring, exhaust, vacuum lines, intake as well as fuel injectors

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