P0492 OBD Error Code: Problem & Solutions

<<See All OBD Codes

The error code P0492 can be identified as Secondary Air Injection System Insufficient Flow Bank 2. This would mean that there is some issue on the side of the secondary air injection system, which is actually responsible for the emissions control.

This diagnostic fault code is a generic powertrain code, which means that it would apply to the OBD-II equipped vehicles. The specific repair steps can vary as it depends upon the vehicle make and model.

It is the secondary air injection system which would inject the air into the exhaust to dilute the mixture and to enable lower emission production. During the cold start, fresh air is pumped to the exhaust system to feed both the oxygen as well as exhaust gases and to ensure more complete burn as well as less harmful emissions for the vehicle.

Then the PCM would receive the information about the air pressure as well as air flow of this system and would convert that information to the voltage signals. This would then help the computer to determine if there is an issue or not. The trouble code P0492 would mean that the PCM has actually detected a problem with the secondary bank in the air injection system, which works by reducing the overall emissions.

What causes this problem with the Secondary Air Injection System Insufficient Flow Bank 2?

• Faults in the one-way check valve
• Issue of intake leak
• Defects in the relay
• The air injection pump fuse might be blown
• Defects in the secondary air pressure sensor
• Clogged secondary air injection ports in the cylinder head
• The problem of vacuum leak

1. Catalytic Converter - Do you remember when was the last time you got your car Catalytic Converter inspected up? A defective Catalytic Converter can cause a lot of issues like displaying P0492 code.
2. Oxygen Sensor - Are there some faults in your Oxygen Sensor? Don’t waste time and get them replaced or else P0492 code can turn up. Buy top notch Heated Oxygen Sensor online with us.
3. Powertrain Control Module - OBD Code P0492 can appear because of faulty Powertrain Control Module.
4. Air Fuel Ratio Sensor - Everything is fine with Oxygen Sensor and still P0492 code triggering? Then you must get your Air Fuel Ratio Sensor checked.
5. Engine Control Module - There can be some issues with the Engine Control Module due to which you may see P0492 code appearing over and over again. Visit us to buy best quality Engine Control Module online.

Our main motive is to achieve customer satisfaction and that’s why we will help you to diagnose P0492 code by mentioning some major symptoms below:

Common Symptoms

• Issue of hesitation on acceleration
• Engine stalling at start up or when idling
• Hissing sound can start coming

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 P0492:

• You must replace the pump and the one-way check valve
• Leakage in the vacuum line should be repaired
• The cylinder head may need to be thoroughly cleaned of carbon build up before the code can be cleared permanently
• There can be need to replace the intake manifold gasket if it has developed a leakage

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 Engine Block Heater, 02 Sensor, Heating Controls and many more. Now all your problems would vanish within no time

First of all, the mechanic will check the codes stored in the computer using a handheld scanner and clear them. The mechanic will then test drive the car to verify symptoms and to see if the code will set again

It should be noted down that in many instances, an accurate diagnosis can only be made when the engine is cold. The pump operation will need to be verified by removing the pressure hose. Carefully check it for electrical problems

The check valve should be inspected when cold. This requires multiple steps, including the removal of vacuum lines, the attachment of a vacuum pump and more, depending on how the valve performs in each step

A visual inspection for carbon build-up within the cylinder head and/or EGR valve may also be necessary. If build-up is noticed, the head will need to be cleaned out thoroughly

The mechanic should also conduct a thorough visual inspection of all secondary air injection system hoses and lines to check for tears, deterioration, cracking and other problems

Finally, the intake will need to be checked for leaks. This is most common on the intake manifold gasket

Common Mistakes When Diagnosing The P0492 Code

• A common mistake which can be made here is not replacing the check valve
• If you will replace the pump then it might fix the problem for a short period of time, but if the check valve is faulty and is not replaced, the new pump will fail shortly after getting installed

P0492 - Secondary Air Injection System Insufficient Flow Bank 2