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Toyota Service
Toyota Service, Toyota Expert
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I have 2000 camry with PO 401 code just came up. Easy or

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I have 2000 camry with PO 401 code just came up. Easy or expensive solution?
Submitted: 1 year ago.
Category: Toyota
Expert:  Toyota Service replied 1 year ago.

Hello. Welcome to Just Answer. Please allow me to assist you. A P0401 code indicates an insufficient EGR flow. Usually, this is caused by a stuck EGR valve, a bad vacuum switching valve, A bad EGR transducer, a cracked EGR vacuum hose, or a combination of any of the above. When the EGR vacuum sources are suspect, it is usually best to replace all three units. This can cost over 400 dollars to replace everything. Based on experience, you either have a stuck closed EGR valve or a bad vacuum switching valve that opens the EGR. I would consider replacing the EGR vacuum switching valve, but only after running a can of really good fuel injection cleaner thru the system via a product put into the fuel tank. We use a product called BG 44-k. Put a can in the tank and drive it. The cleaner will clean the carbon out of the EGR passages. Well worth the 25 dollar investment, and beats needlessly replacing EGR parts that may not be bad.

Expert:  Toyota Service replied 1 year ago.

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