Waiting for them to get airbags, hopefully next week. If buildup is noticed, the head will need to be cleaned out thoroughly. Mine was disconnected at a vacuum switch, top of engine drivers side. Definition The secondary air injection system injects air into the exhaust to dilute the mixture and enable lower emission production. Common mistakes when diagnosing the P0492 code One common mistake here is not replacing the check valve. After that, they will test that the one-way check valves to make sure that air only goes through one direction. Just to finish this off.
Other related codes to secondary air injection system are P0410, P0411, P0412, P0413, P0414, P0415, P0416, P0417, P0418, P0419, P041F, P044F, and P0491. Note that in many instances, an accurate diagnosis can only be made when the engine is cold. This is most common on the intake manifold gasket. Started it up the next morning and no more loud roaring noise. If you have any doubt as to repairs on your vehicle, please contact your technician. Also the loud roaring noise from the engine bay during cold start was still occurring.
The most common repairs are replacement of the pump and the. The P0492 code is relatively serious, and it should be diagnosed and repaired quickly. The pump operation will need to be verified when cold by removing the pressure hose. The information contained on this site is presented for informational purposes only. Did anyone else have the code clear after a few engine starts? My Check Light Is On Has Three Code P0491 P0492 P0421 Q5 fsi carbon build up page 32 audiworld forums 2010 audi a6 3 0t premium avant quattro tiptronic overview p0491 audi q5 best photos and description imagedump q5 fsi carbon build up page 32 audiworld forums trying to find the fuse for secondary air injection pump its.
It features air pump, exhaust manifold, vacuum control switch, input check valve and an electrical input circuit for the vacuum control switch, along with tons of hoses. There are many Vedios on You Tube showing this specific problem solving on German cars. Definition The secondary air injection system injects ambient air into the exhaust to dilute the mixture and enable lower emission production. P0491 and P0492 indicate that you have insufficient air injection flow into the exhaust manifolds. Enter the 5 character trouble codes in the search box and submit the search. The check valve will need to be inspected when cold. But as for the relay I didn't know how to determine if it is in good working condition.
This can take a lot of driving cycles to occur. However, will also need to be repaired, and the cylinder head may need to be thoroughly cleaned of carbon build up before the code can be cleared permanently. It will also need to be checked for electrical problems after being detached from the wiring harness. We are not responsible for any actions you take on your vehicle. .
You either have a blockage in the vacuum system or a leak in the vacuum system causing the valves to not open. There is a vacuum solenoid valve that provides manifold vacuum to the air injection valves for each side of the engine. Other related codes to secondary air injection system are P0410, P0411, P0412, P0413, P0414, P0415, P0416, P0417, P0418, P0419, P041F, P044F, and P0492. It features air pump, exhaust manifold, vacuum control switch, input check valve and an electrical input circuit for the vacuum control switch, along with tons of hoses. Replacing the intake manifold gasket may also be necessary if it has developed a leak. The motor ran fine, no issues there. Need help with a P0492 code? I've seen in other threads here that these codes have appeared in 8 cylinder models but I was unable to find a similar thread for the 12 cylinder cars.
The easiest way to find out what this light is telling you is to hook your vehicle up to a scan tool. The Porsche 993 suffered from clogged secondary air injection ports in the heads from carbon and it was a bear to clean them out. They are printed on a paper color id tag which is guaranteed to fall off and disappear just when you need to find it. Mine too still comes on every now and then and needs to be reset. The oxygen sensors are looking for a leaner mixture caused by the air being injected into the exhaust and are not seeing it and setting the codes. The codes are for the secondary air injection systems and the 491 and 492 are for banks 1 and 2.
To verify that the code is not an intermittent condition, the codes as cleared and the vehicle will be taken to a test drive and scanned to see if the codes return. Then, they test system fuses. To verify that the code is not an intermittent condition, the codes as cleared and the vehicle will be taken to a test drive and scanned to see if the codes return. My gain in low end powers is remarkable, I highly recommend any of you doing this. I'm curious about this as well as I've had the same issue with my 2010. Then, they test system fuses.
If so, what was done to resolve the problem? This system tests the fuel system to make sure it is not leaking fuel vapors into the air. YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. They are going to take a closer look over the next few days, plus I just got the recall notice for my secondary air bag and I am hoping they can get that taken care of as well. The fact that it is the same code set on both sides indicates that it is a problem common to both sides. After you instruct it to perform the scan, it speaks with your car's computers to find out exactly what's prompting the light to turn on. If it results in engine stalling, it could also pose a safety issue.
The leak detection pump is part of the evaporative emissions system. Next, they inspect the system hoses and fittings and look for signs of cracks, heat damage and other conditions that may cause the hoses to leak. Took my 458 in today for the above problem and the error code was gone when we turned the car on at the dealer. P0492 Audi Possible Solution: Indicator and headlight bulbs need regular maintenance for them to keep functioning properly. The dealer scanned my 458 and there were no faults present or even stored. The corrective action for P0492 is to check the air hose for the secondary air pump and the pump relay.