P0432 OBD Error Code: Problem & Solutions

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The P0432 fault code indicates that the efficiency for the catalytic converter on engine bank 2 has fallen below its minimum allowable limit or it means that it is performing below what it should be. It is a sign that there is a failure in the converter and the issue might be related to the oxygen sensor. It is the catalytic converter which is responsible for burning harmful emissions in your exhaust and it is not working properly.

The P0432 error code can be defined as Main Catalyst Efficiency Below Threshold (Bank 2). The main function of the catalytic converter in the vehicles is to improve the tailpipe emissions as well as oxygenating the exhaust gases. It converts HC (hydrocarbons), CO (carbon monoxide) and NOx (nitrogen oxide) into H2O (water vapor), CO2 (carbon monoxide) and Nitrogen.

The powertrain control module carefully monitors the efficiency of the catalyst through the post catalyst O2 sensor.

What causes this problem with the Main Catalyst Efficiency Below Threshold (Bank 2)?

• Engine running at outside its optimal air: fuel ratio
• Internal engine damage that causes the engine to have high oil consumption
• Damaged or non-functional catalytic converter
• Engine misfires causing damage to the catalyst
• Head gasket leak which caused damage to the catalytic converter

1. Air Fuel Ratio Sensor - Do you remember when was the last time you got your car Air Fuel Ratio Sensor checked up? A dirty Air Fuel Ratio Sensor can cause a lot of issues like displaying P0432 code.
2. Oxygen Sensor - OBD Code P0432 can appear because of faulty Oxygen Sensor.
3. Engine Control Module - Everything is fine with Oxygen Sensor and still P0432 code triggering? Then you must get your Engine Control Module checked.
4. Catalytic Converter - There can be some issues with the Catalytic Converter due to which you may see P0432 code appearing over and over again. Visit us to buy best quality Catalytic Converter online.
5. Exhaust System Parts - A lot of issues can arise do to defective Exhaust System Parts. Did you just see P0432 code flashing? Now you know the reason why it is appearing. Get it inspected and replaced on time.
6. Powertrain Control Module - Faulty Powertrain Control Module can be the reason why P0432 code is flashing. Visit us to purchase top notch Powertrain Control Module online.

Our main motive is to achieve customer satisfaction and that’s why we will help you to diagnose P0432 code by mentioning some major symptoms below:

Common Symptoms

• There can be loss of power
• Engine might start stalling
• Appearance of the check engine light
• Engine hesitation on acceleration
• Issue of hissing noise on acceleration
• The car may not start at all

If you wish to correct this fault code, then you have to follow certain steps. Correcting a problem needs your careful attention. Here are some ways with the help of which you will be able to correct the OBD Code P0432:

• Carefully repair the exhaust leaks ahead of the catalytic converter
• If there is a failure in the catalytic converter, then it should be replaced
• The defective oxygen sensor should be replaced

There is no need to get strained if your OBD Code is still flashing up as we are here at your service. Have a look at our superior variety of Car Sensors, Ntk Oxygen Sensor, Heated Oxygen Sensor, Car Exhaust Catalyst and many more. Now all your problems would vanish within no time.

Here are some steps which you should follow in order to diagnose this fault code:

• If you want to diagnose the P0432 code, then you will first require the mechanic to connect an OBD II scanner to the car’s computer. The codes will be read and then cleared. The car will then be test driven to see if the codes reset
• Then another step would be to determine whether the catalytic converter has actually failed, or if there is another reason for the code to be set. If there is an oxygen sensor code stored too, then the O2 sensor will need to be replaced before the converter can be diagnosed
• It is also important for the mechanic to check for exhaust leaks in the manifold and other exhaust components ahead of the catalytic converter
• Many a times leaks in these areas can cause the computer to inaccurately set the P0432 trouble code
• If there is presence of leaks, they will need to be repaired and then the system should be retested (to see if the code resets again), before replacing the catalytic converter

Common Mistakes When Diagnosing The P0432 Code

• It can be a big mistake to simply replace the catalytic converter without actually inspecting the real cause of failure
• Internal melting is possible due to simple premature failure, it is more likely that there is an underlying problem responsible, which will in turn cause the new converter to fail prematurely as well