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you can find a good answer in this site: http://www.obd-codes.com/trouble codes/generic/p0401-insufficient-exhaust-gas-recirculation-flow-egr.php EGR First off Your Honda is really an Isuzu Rodeo, but you already knew that. These have the GM electronic egr. if you have the 3.2 motor. The only way to fix it is to replace the egr valve.
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I don't have a '98 -- I have a 2000, but I am betting the fix is pretty similar. This was maybe the easiest repair I have ever done. I had a problem a few weeks back where th…e car wasn't starting up very well and it would almost stall at times, particularly when it was low on fuel. The check engine light came on and the diagnosis was a P1404 or P4404 (don't recall) that indicated a problem with the EGR valve. Before I ended up replacing the valve I took it off and cleaned it, replacing the gasket before reattaching. The valve is right up against the firewall slightly to the left of the engine block and has an electrical sensor plug on top. Disconnect the plug and remove the valve by removing the two bolts on either side. I think it's an 11mm. Anyway, once the bolts are out and the plug is disconnected, it should come right off. If it's black and caked with carbon, chances are the EGR is your problem. I've been told it's common with Passports and Rodeos. You can clean it with some brake dust remover and an air compressor or just replace it. If you push down on the valve and it doesn't pop right back up or sticks after you've cleaned it, just replace it - the valve is bad. I put mine back on after cleaning it and it failed again four days later. Probably not a bad idea to replace the gasket either way. A new one is probably around $120 - $150, which is really not too bad. This was seriously the easiest repair I have ever made on any vehicle I have ever owned. It took literally five minutes.
If you have less than 80,000 on it read below. Occasional problems on this vehicle are failures of the Exhaust Gas Recirculation (EGR) Valve Passages and the EGR va…lve (3.0L V6 engine only). Honda has extended the warranty on problems related to the EGR System to 8 years or 80,000 miles.
How do you fix a obd2 error code low egr flow on a 1996 Chevy cavalier 2.4 L I've already replaced the egr valve and checked for leaks?
Well I will let you know shortly, I did clean the throtle body with a good carburetor cleaner as was suggested for another car and right now the code did not come back as yet …and it did not trigger a single event as yet.Next would be to flush out this valve and then replacement.
u dont reset egr valves if you are talking about the service engine soon light or the check engine light the you need factory scan tool or a aftermarket scan tool Actuall…y you can take the ground cable off for 15 min and if the air flow is right then the light will go off and stay off.
How do you fix the EGR valve associated with a check engine light error code P0401 on a 1999 Acura 3.2 TL?
It's not the valve. I've never worked on an acura. but it's not the valve. they rarely short out. check the passages, and the vacum pump. hopefully someone with acura experien…ce comes along. good luck. Ok this guy is a clown. I have never worked on an acura either but it may verry well be that the egr valve is coverd in carbon. The carbon is easy to clean with a wire brush if you remove the valve.The main cause of malfunction in an egr valve is the carbon build up leaving it stuck open or closed! Simple huh? i have a 99tl that had the same problem. simply remove the intake and clean the carbon from the passages to egr. it not difficult, it took about 15 mins and have not had trouble since, good luck! Absolutely right! I had a problem where when I drive at a constant speed of 45mph or higher, my '99 Acura TL would behave very weirdly. The engine didn't turn off but even though the car is in DRIVE but still behaved like it was in NEUTRAL, and then it will kick back in and start working again. This happened a lot of times then the check engine light came on. I received the P0401 error code. I bought a new EGR valve from Autozone and replaced it. Works great. However, I do hear a little bit louder noise when the engine starts and I take off, but the Autozone guy told me that it is because there is a lot more air passing through, since the old valve was clogged up. It is fairly easy and quick to change. I love the performance now!
How can you correct egr flow insufficient on a 1998 Honda passport when you have already installed a new egr valve and gasket?
Try using a strong thin wire inside the hole below the egr and try cleaning the obstructed hole. Your problem is the intake port inside the throttle body. Remove the air …intake so you can see into the throttle body and clean out the air intake port to the EGR valve. I replaced everything and finally figured out that the intake was clogged up. Your EGR valve isn't receiving sufficient amount of air, and that isn't anything wrong with the valve itself.
2001 ford explorer sport Fault code p0401 insufficent flow detected keeps coming up you have replaced the EGR valve did not hold vacuum and the vacuum regulator you also took off the throttle body?
lol. went through a lot with this one, huh? how about your dpfe sensor? did you replace it? It would cause all of that. Did you thoughougly clean out your egr pass…ageways inside the throttle body? Did you check for clogged hoses (both the red and green facory hoses tend to get clogs in those 90 degree turns they make to navigate the engine parts) Good luck, sounds like you know what you are doing, though. mb
Answer EGR stands for Exhaust Gas Recirculation, which basically sends some of the exhaust back into the engine cylinder again. Your error means that there isn't …enough of the exhaust gas making it back to the intake manifold. The first thing I'd check is the tubes coming off of the EGR valve to make sure they aren't clogged or broken. Then I'd check the EGR valve itself and the throttle body. The problem is usually: 1.) Carbon buildup causing a clogging. 2.) Broken hoses. 3.) Broken Valve.
back of engine just left of the engine block. It is a little silver cylinder.
P0401 indicates an insufficient flow of gases through the EGR system. While Honda EGR valves occassionally fail, your first step should be to check if the EGR is operati…ng when vacuum is applied. If so, remove it and clean the orifice with brake cleaner. While you have it off, clean the intake porting with carb cleaner and a stiff wire brush. Carbon build up in either the EGR or the intake will set this code.
Trouble code P0401 means:Exhaust gas recirculation flow insufficient detected
EGR System, insufficient flow detected, maybe bad sensor? Your sensor is more than likely fine. It is probably the air intake to the EGR located in the throttle body. Tak…e off the air intake cover and it is right behind the throttle plate. Just clean out the import to the EGR, because it gets clogged up and then the EGR isn't receiving the correct amount of air. Try that before you go spend the money on a pricey sensor.
I was looking up the same thing and came across these answers: ... "very well be that the egr valve is coverd in carbon. The carbon is easy to clean with a wire brush if you r…emove the valve.The main cause of malfunction in an egr valve is the carbon build up leaving it stuck open or closed! Simple huh? i have a 99tl that had the same problem. simply remove the intake and clean the carbon from the passages to egr. it not difficult, it took about 15 mins and have not had trouble since, good luck!"
Trouble code P0401 means: EGR System Malfunction Replace the EGR Valve
Trouble code P0401 means:Exhaust gas recirculation flow insufficient detected
2001 ford explorer sport Fault code p0401 insufficent flow detected keeps coming up you have replaced the EGR valve did not hold vacume and the vacume regulator you also took off the throttle body?
In Toyota Camry
P0401 indicates problems with EGR system... It might a simple one, for instance, you just need to clean EGR pipe and valve. Or it can be more expansive one like faulty EGR val…ve or EGR sensor. Which one you have impossible to answer without testing the car. And you can use the professional Toyota tool to repair it, I think the Toyota it2 is a good tool for it.