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Mike S.
Mike S., ASE Certified Technician
Category: Ford
Satisfied Customers: 6796
Experience:  ASE Certified Master Technician
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1996 ford mustang cobra just got a p0411 code ?

Customer Question

1996 ford mustang cobra just got a p0411 code ?
Submitted: 1 year ago.
Category: Ford
Expert:  SuperDave replied 1 year ago.
Thank you for using just answer I will help you with your question.Does the engine start?
Customer: replied 1 year ago.

yes it starts.i was driving it all morning pull driveway just about to shut it off and engine light pops on

Expert:  SuperDave replied 1 year ago.
This code is caused by the secondary air injection failing which is usually the pump, solenoid, or relay
Customer: replied 1 year ago.

where should I start

Expert:  SuperDave replied 1 year ago.
It's common for the vacuum line between the AIR solenoid and the switching valve to break and lose vacuum, this will set this code,check this vacuum line.
Customer: replied 1 year ago.

where is the solenoid located from the pump

Expert:  SuperDave replied 1 year ago.
This hose goes between the switch and the solenoid, they are on the right front of the engine compartment.
Customer: replied 1 year ago.

the hose is connected and looks good.

Expert:  Mike S. replied 1 year ago.

Here is a list of the possible causes:

  • Air pump output is blocked or restricted

  • AIR bypass solenoid is leaking or it is restricted

  • AIR bypass solenoid is stuck open or stuck closed

  • Check valve (one or more) is damaged or leaking

  • Electric air injection pump hose(s) leaking

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