2000 Audi A4 2.8L 30V ATQ QUATTRO (P1423 FFD CODE)
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From: USA
2000 Audi A4 2.8L 30V ATQ QUATTRO (P1423 FFD CODE)
Hey guys!
I'm new to AudiForums. Excuse my noobness. I have browsed through the B5 forum on this site, but I have yet to find a solution to my problem.
Okay, so lets begin. I drive a 2000 Audi A4 2.8l 30V ATQ QUATTRO. She's 13 years old now, with about 82,200 miles on her. I bought her back in November of last year. When she became mine I performed a bunch of maintenance myself and the things I couldn't do because of a lack of tools, my mechanic did. I have taken care of most of the necessities like the engine oil filter, transmission oil filter, fluids (motor oil, ATF, brake fluid, gear oil for the differentials, fresh antifreeze and etc), fuel filter, spark flugs, timing belt with tensioner & waterpump, valve cover gaskets, cam tensioner gaskets, and anything else that we noticed was leaky, you get the point. I know its irrelevant but I also changed my rotors, pads, front and back shocks and threw a 3 inch catback on her.
So here is my problem. P1423. If only you knew how much I despise this code. First thing I did is checked the vacuum lines. Replaced all the lines I could see and track down. Changed that half black and half blue check valve with a new check valve. Changed that green one way check valve below the suction pump. Changed the suction pump. Changed the crankcase breather hose because it was broken. Changed the crankcase breather hose that is in the back by the intake manifold. Changed my BANK 1 side EGR Valve (passenger side of the vehicle). Changed my Secondary Air Injection pump.
After replacing all these parts, the code was still there. P1423.
Changed the actuator vacuum solenoid also known as the N249 valve. After changing this solenoid, my OBD-II scanner showed me FFD codes for my passenger side O2 sensor (the one that is behind the flex pipe, before the catalytic converter). I got a little excited and thought, hey I already replaced half the system, maybe the problem was this damn sensor all along. So I went ahead and replaced the sensor. Plugged my OBD-II scanner up, deleted the FFD code, and turned her on. The SAI pump always turns on during cold starts. In my car it turns on for about 60 seconds, turns off, goes back on for like 5 seconds and turns off again. Every time I would delete the FFD codes, they would reappear after the SAI pump went through its whole procedure ( on for 60 seconds, turns off, then goes back on for another 5 or so). This time the codes didn't appear so I felt pretty good about myself and thought she would be able to pass inspection no problem. I was wrong. I went to a NJ state inspection facility and the gentlemen gave me a printout showing that at the moment of the inspection I had no OBD-II codes present, but the oxygen sensor, catalytic converter and SAI system were "not ready". He told me to go drive like 60 miles and everything should reset itself. I did just that and drove home.
This morning I started her up, and guess what, my good old friend P1423 is back. My OBD-II scanner says "P1423 BANK 1 AIRFLOW TOO LOW".
So my question to you guru's out there is, do I have to change the other O2 sensor on the passenger side (right by the exhaust manifold), change my EVAP purge valve, or are my headers clogged on the passenger side.
I have the EGR Valve for the drivers side also known as BANK 2, but I didn't put it on cause my mechanic said the problem is on the passenger side. I also bought the pressure line that connects both EGR's to the N249 actuator solenoid valve on BANK 1 (passenger side), but I didn't replace it because it seems like the one that is on isn't leaky. I tried to check the hoses and pipes that run from the SAI pump, and I think they are okay, but who knows, I may be wrong. I've poured Seafoam into my gas tank, crankcase and even sucked some through the vacuum lines a few times (probably about 5 times). I thought maybe that would help but no it didn't.
If you guys are still with me, thank you so much for reading my dreadful post. I am sick and tired of this problem. I have spent a lot of money trying to fix it and to be honest I don't think its worth investing any more money into her. It just doesn't make sense. Sometimes I think they created the whole emissions stuff just to make our lives way more difficult.
Any input on this problem would be dearly appreciated. I really don't know where to turn anymore. I hope I don't have to take my headers off, cause if I do I think ill just set her on fire and collect my insurance money.
Thank you in advance.
Sincerely,
Kamil
I'm new to AudiForums. Excuse my noobness. I have browsed through the B5 forum on this site, but I have yet to find a solution to my problem.
Okay, so lets begin. I drive a 2000 Audi A4 2.8l 30V ATQ QUATTRO. She's 13 years old now, with about 82,200 miles on her. I bought her back in November of last year. When she became mine I performed a bunch of maintenance myself and the things I couldn't do because of a lack of tools, my mechanic did. I have taken care of most of the necessities like the engine oil filter, transmission oil filter, fluids (motor oil, ATF, brake fluid, gear oil for the differentials, fresh antifreeze and etc), fuel filter, spark flugs, timing belt with tensioner & waterpump, valve cover gaskets, cam tensioner gaskets, and anything else that we noticed was leaky, you get the point. I know its irrelevant but I also changed my rotors, pads, front and back shocks and threw a 3 inch catback on her.
So here is my problem. P1423. If only you knew how much I despise this code. First thing I did is checked the vacuum lines. Replaced all the lines I could see and track down. Changed that half black and half blue check valve with a new check valve. Changed that green one way check valve below the suction pump. Changed the suction pump. Changed the crankcase breather hose because it was broken. Changed the crankcase breather hose that is in the back by the intake manifold. Changed my BANK 1 side EGR Valve (passenger side of the vehicle). Changed my Secondary Air Injection pump.
After replacing all these parts, the code was still there. P1423.
Changed the actuator vacuum solenoid also known as the N249 valve. After changing this solenoid, my OBD-II scanner showed me FFD codes for my passenger side O2 sensor (the one that is behind the flex pipe, before the catalytic converter). I got a little excited and thought, hey I already replaced half the system, maybe the problem was this damn sensor all along. So I went ahead and replaced the sensor. Plugged my OBD-II scanner up, deleted the FFD code, and turned her on. The SAI pump always turns on during cold starts. In my car it turns on for about 60 seconds, turns off, goes back on for like 5 seconds and turns off again. Every time I would delete the FFD codes, they would reappear after the SAI pump went through its whole procedure ( on for 60 seconds, turns off, then goes back on for another 5 or so). This time the codes didn't appear so I felt pretty good about myself and thought she would be able to pass inspection no problem. I was wrong. I went to a NJ state inspection facility and the gentlemen gave me a printout showing that at the moment of the inspection I had no OBD-II codes present, but the oxygen sensor, catalytic converter and SAI system were "not ready". He told me to go drive like 60 miles and everything should reset itself. I did just that and drove home.
This morning I started her up, and guess what, my good old friend P1423 is back. My OBD-II scanner says "P1423 BANK 1 AIRFLOW TOO LOW".
So my question to you guru's out there is, do I have to change the other O2 sensor on the passenger side (right by the exhaust manifold), change my EVAP purge valve, or are my headers clogged on the passenger side.
I have the EGR Valve for the drivers side also known as BANK 2, but I didn't put it on cause my mechanic said the problem is on the passenger side. I also bought the pressure line that connects both EGR's to the N249 actuator solenoid valve on BANK 1 (passenger side), but I didn't replace it because it seems like the one that is on isn't leaky. I tried to check the hoses and pipes that run from the SAI pump, and I think they are okay, but who knows, I may be wrong. I've poured Seafoam into my gas tank, crankcase and even sucked some through the vacuum lines a few times (probably about 5 times). I thought maybe that would help but no it didn't.
If you guys are still with me, thank you so much for reading my dreadful post. I am sick and tired of this problem. I have spent a lot of money trying to fix it and to be honest I don't think its worth investing any more money into her. It just doesn't make sense. Sometimes I think they created the whole emissions stuff just to make our lives way more difficult.
Any input on this problem would be dearly appreciated. I really don't know where to turn anymore. I hope I don't have to take my headers off, cause if I do I think ill just set her on fire and collect my insurance money.
Thank you in advance.
Sincerely,
Kamil
Last edited by Kamil`; Jun 23, 2013 at 09:21 AM.
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Joined: Jun 2013
Posts: 352
From: USA
And just incase anyone is wondering, I think the N249 valve and the N112 valve is the same thing. I noticed that on this forum a lot of people call the vacuum solenoid the N112 valve. On ECS it says that one valve controls the DV valve while the other controls the EGR valves. I only replaced the valve on the passenger side (bank 1). Is it possible that I need to replace both solenoids and both EGR's?
When I get the time I will be taking out my airbox to get a better look from the top to see if those SAI pump hoses are cracked. If they are I am ducktaping them.
When I get the time I will be taking out my airbox to get a better look from the top to see if those SAI pump hoses are cracked. If they are I am ducktaping them.
Last edited by Kamil`; Jun 23, 2013 at 11:17 PM.
Thread Starter
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1st Gear
Joined: Jun 2013
Posts: 352
From: USA
Well after speaking to my mechanic I decided to buy another solenoid for BANK 2, another 02 Sensor for BANK 1, and the EVAP purge valve. I have the BANK 2 EGR Valve which I should also put on. I am assuming if I put all these parts on, and I still got the code, my BANK 1 (passenger side) head is clogged.
I am totally screwed.
I am totally screwed.
1st Gear
Joined: Feb 2014
Posts: 10
From: Las Vegas, NV, USA
I'm just checking to see if you ever got this resolved?? I have a 1998 A4 2.8L 30V Avant that I'm doing...well...almost everything you listed in your original post. I'm getting there anyway.
My most pressing current issue is this: I have a gross leak in the EVAP. I know the problem because I broke the damn line. :/ It's that thin line that runs along the valve cover and to the vacuum reservoir. I ordered the vacuum hose replacement kit from ECS and got to work. Wrong ones. The kit had everything I needed to change the hoses up by the intake, but not the thin little lines that are brittle as heck and shattered when I barely touched it. :/ Any suggestions where I can find those lines?? The parts guy at the dealership kept trying to give me the regular lines, like the ones in the ECS kit, but not the thin ones... And the regular ones are too think to fit. I tried. Recommendations?
My most pressing current issue is this: I have a gross leak in the EVAP. I know the problem because I broke the damn line. :/ It's that thin line that runs along the valve cover and to the vacuum reservoir. I ordered the vacuum hose replacement kit from ECS and got to work. Wrong ones. The kit had everything I needed to change the hoses up by the intake, but not the thin little lines that are brittle as heck and shattered when I barely touched it. :/ Any suggestions where I can find those lines?? The parts guy at the dealership kept trying to give me the regular lines, like the ones in the ECS kit, but not the thin ones... And the regular ones are too think to fit. I tried. Recommendations?
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