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P0411. 2014. Replaced secondary air valve, ran air pump with…

Customer Question
2014 Mechanic's Assistant: Are...

2014

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

Yes replaced secondary air valve, ran air pump with scan tool, verified no cloggs in hoses or ports in cylinder head

Mechanic's Assistant: Do the vents feel cold? Is there a coolant leak?

What vents??? no coolant leak

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

Had same code 6 mths ago, replaced valve ok untill now, valve is gm supplied

Submitted: 7 months ago.Category: Chevy
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Answered in 5 minutes by:
11/25/2017
Chevy Mechanic: Dan, Technician replied 7 months ago
Dan
Dan, Technician
Category: Chevy
Satisfied Customers: 25,969
Experience: Independent Shop Experience, 2 Year Automotive Diploma, & Access to Information Database
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Chevy Mechanic: Dan, Technician replied 7 months ago

What model and engine size is vehicle?

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Customer reply replied 7 months ago
2014 impala lt 2.5
Chevy Mechanic: Dan, Technician replied 7 months ago

I​ think the new valve has probably failed, I'm assuming you have activated pump already? does scan tool allow you to activate valve?

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Customer reply replied 7 months ago
OK but this was 2nd valave, air pump runs with scan tool & when bypassing relay,i believe scan tool has that capability, code came right back after cold restart with new gm valve
Chevy Mechanic: Dan, Technician replied 7 months ago

I think troubleshooting chart is going to be your best option with this code. This code means the pressure sensor built into the valve did not detect enough pressure which would either mean weak pump, clogged port, or sensor not working properly and the troubleshooting chart will walk you through testing each component. Here is chart, let me know if you have more questions. Thanks. https://www.dropbox.com/s/dfc3bqiowc98evp/0411.pdf?dl=0

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Chevy Mechanic: Dan, Technician replied 7 months ago

Ever get it figured out? Please do not forget to rate answer. Thanks.

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