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Codes p1404 and p0404 runs sluggish but clears out after…

Customer Question
Codes p1404 and p0404...

Codes p1404 and p0404 runs sluggish but clears out after like 45mph when u let of gas a little..changed egr valve same problem

Mechanic's Assistant: Has the vehicle turned into a gas hog? And how does it start -- same as usual?

Yes gas hog and seems to start the same

Mechanic's Assistant: What is the model/year of your Chevy?

2001 chevy monte carlo 3.8 litre

Mechanic's Assistant: Are you fixing your Monte Carlo yourself? What have you tried so far?

Replaced egr valve no difference

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

Is it possibly a catalytic converter ?

Submitted: 10 months ago.Category: Chevy
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Answered in 8 minutes by:
10/3/2017
Chevy Mechanic: Gary, Chevy Technician replied 10 months ago
Gary
Gary, Chevy Technician
Category: Chevy
Satisfied Customers: 18,026
Experience: 15 years GM master tech
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Welcome! My name is ***** ***** I will do my best to assist you with this problem.Ask me about added features such as phone contact anytime if you wish !

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Chevy Mechanic: Gary, Chevy Technician replied 10 months ago

how long before it resets the codes ?

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