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http://www.tegger.com/hondafaq/tsb/accord/A99-085.pdf
There is a TSB related to that CEL but the TSB is for 98+. It may be related to your problem.
It is for usually clogged EGR passages.
That code definition is not found in your scan tool as im guessing you just have a generic global OBD2 scanner?
Thanks…it scans manufacturer codes as well but I only used global….I did find a vacuum hose disconnected. I think that might have been the problem.
The code is for insufficient EGR lift (BTW if you use the search function and type in that code at the top of this page it gives you that answer). My first step would be to locate and clean the EGR passages if I find them to be clean I would then check the EGR valve, if I’m not mistaken that one is still vacuum operated so it may not be the valve itself but it’s control solenoid located in the ‘black box’ on the firewall but first activate the EGR with a vacuum pump at idle to see if the engine begins to stumble or stall this would indicate the EGR is functioning, if you end up replacing solenoid then also replace the round filter on the top of the solenoid as I find that this also helps keep the code from coming back.
My car is also 96 Accord and am dealing with the same issue. First, it was the P0401 code. I found your vid on youtube (many thanks for that) and cleaned the EGR passages. Mine was absolutely gunked up and blocked. But noww….its the P1491 code. I’m going to try cleaning the EGR itself and see if that takes care of it.
By the way, is it best to clear the CEL codes after each repair (or attempted repair) in this case? Or is it best to keep running the car and see if the CEL goes away by itself to let you know it really has been fixed?
My car is also 96 Accord and am dealing with the same issue. First, it was the P0401 code. I found your vid on youtube (many thanks for that) and cleaned the EGR passages. Mine was absolutely gunked up and blocked. But noww….its the P1491 code. I’m going to try cleaning the EGR itself and see if that takes care of it.
By the way, is it best to clear the CEL codes after each repair (or attempted repair) in this case? Or is it best to keep running the car and see if the CEL goes away by itself to let you know it really has been fixed?
Insufficient lift codes are often the result of clogged passages, however they can also be the result of an EGR valve that isn’t working properly, or the solenoid that controls it on the firewall. You can check the EGR valve with a vacuum pump. As for the solenoid, if the EGR valve is working you might want to replace the solenoid along with the filter on top of it. It’s a common issue of vehicles of that vintage.
Good luck and keep us posted.
Insufficient lift codes are often the result of clogged passages, however they can also be the result of an EGR valve that isn’t working properly, or the solenoid that controls it on the firewall. You can check the EGR valve with a vacuum pump. As for the solenoid, if the EGR valve is working you might want to replace the solenoid along with the filter on top of it. It’s a common issue of vehicles of that vintage.
Good luck and keep us posted.
I haven’t had time to fiddle with my car this week but did noticed today I accidentally forgot to reconnect one of the vacuum lines that came loose when I lifted the fuel rail to clean the EGR passages(noob). Not 100% sure if that line goes to the EGR. If the CEL code hasn’t cleared by this weekend then I’ll look into the EGR valve itself and the solenoid.
I haven’t had time to fiddle with my car this week but did noticed today I accidentally forgot to reconnect one of the vacuum lines that came loose when I lifted the fuel rail to clean the EGR passages(noob). Not 100% sure if that line goes to the EGR. If the CEL code hasn’t cleared by this weekend then I’ll look into the EGR valve itself and the solenoid.
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