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EGR VALVE problems... code p0401 98' lude sh

 
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Old 06-27-2008, 01:04 PM
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EGR VALVE problems... code p0401 98' lude sh

so im getting the p0401 code which states that something is clogged ether the line to or from engine to EGR. not the case i cleaned all the lines nothing changes. (yes i reset the ecu) light comes on after about 10 mins of driving. so i took it to my dad whos a machanic and told me it was the ground for my egr valve sence the egr wasnt turning on. so i have poured over the big book of prelude and i cant find the ground for my egr. can anyone help with this?

thanks
Ty
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Old 06-27-2008, 01:43 PM
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I think you need to replace the EGR solenoid/kinda the fuse for the ERG...i think its one piece from Honda...IE, I think you have to buy the entire EGR and it comes with the new solenoid, you may be able to buy separate...MajesticHonda.com has the Microfiche online and the best prices for Honda part in the nation...order there and it will come sooner than you think and you'll some SO much money over your local Honda dealer(most likely).
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Old 06-27-2008, 05:28 PM
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most likely yes. The EGR fouls up with carbon with time and the solenoid if its unable to operate is going to continue to energize its coil and thats going to burn out. Your best bet is to replace the solenoid, but I dont know if you can find it separately.
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Old 06-27-2008, 05:48 PM
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you can get them at the auto parts store but they are like 250 or so
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Old 06-28-2008, 01:26 PM
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i checked that the solenoid was clogged and thats not the case its not getting any power to the solenoid so it has the be the ground to the egr valve.
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Old 06-28-2008, 06:03 PM
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it looks like code p0401 is likely caused by clogging/leaking in the EGR line or a faulty EGR valve. I know you know this but if your gonna throw a code in this system, this is the one you want. a good carburetor cleaner is going to be your best bet on this one other than replacing the valve.

If it was a faulty electrical circuit to the egr solenoid you would be more than likely throwing a code p1491...general problem with EGR System along with a lot of others. Are there any other codes at all being thrown? the EGR valve itself is not powered, only the solenoid and the lift sensor. Did you test Fuse #14 (ECM, 15A) for actual voltage with a multimeter? I only ask b/c the schematic says that the EGR control solenoid circuit has about 12 other sensors and solenoids on the same power source. Since the ECS is a multiplexed system, if your not getting power/ground you would most likely have a plethura of codes being thrown.

If you have any friends nearby with a 5th gen maybe they will let you borrow their EGR valve just so you can test it real quick to help isolate the problem before you have to spend all that money.

you can reference Chapter 11 in the Helms Service Manual for the entire troubleshooting checklist.
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