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Honda-Man, Honda Mechanic
Category: Honda
Satisfied Customers: 3115
Experience:  I have an Associates Degree in Automotive. 10 Years experience on all makes and models. 20 Years Honda only including factory training. Over 30 years total.
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Have check engine light on. Had the car tested and I was

Customer Question

Have check engine light on. Had the car tested and I was told it was the egr valve.replaced egr n clean intake manifold and light still on. Also replaced all four o2 sensors to see if the light would go off but still on. Please help.
Submitted: 2 years ago.
Category: Honda
Customer: replied 2 years ago.
Posted by JustAnswer at customer's request) Hello. I would like to request the following Expert Service(s) from you: Live Phone Call. Let me know if you need more information, or send me the service offer(s) so we can proceed.
Expert:  Honda-Man replied 2 years ago.

Welcome to JustAnswer.

Can you please tell me what code you have?

Thanks, Honda-Man

Customer: replied 2 years ago.
Expert:  Honda-Man replied 2 years ago.

Thanks, ***** ***** send the offer for the phone call. Once you accept the offer we can speak on the phone.

Expert:  Honda-Man replied 2 years ago.

I have a suggestion that should solve your problem. P0401 is a flow code so the EGR valve won't cause this code to set. If it were bad there would be a code for lift not flow. I remove the EGR valve and start the truck. There will be a noisy exhaust passage that does not plug up. There will be a passage going to the intake manifold that should have good strong vacuum. When it's clear the engine will stall or barely run. There is a small plug in the end of the passage that can be removed to help clean out the passage. I have included a picture with the plug location. I drill a small hole and screw a sheet metal screw into the hole. Then pry it out to clean the passage. Reinstall the plug when done then plug the hole with a screw, washer, and silicone.

Getting late so I will check back in the morning.

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Thank you, Honda-Man