Question about 2000 Ford Mustang

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Diagnose Hi i need to know what this is for on my car, it failed the emission test and they gave me code of P0411. Pls tell me what its for and how can i take care of it. Thank you! Jo

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Have your co2 switch checked

Posted on Jun 04, 2008


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P0411 code fault


P0411 Secondary Air Injection System Incorrect Flow Detected

www.obd-codes.com/p0411
Detailed information on troubleshooting and repairing a P0411 DTC code which has to do with the secondary air ... OBD-II Trouble Code Technical Description.

VW Emissions Code P0411. How to fix it, Quick and Easy ...

? 2:42
https://www.youtube.com/watch?v=x2ul9mbEFZM
Oct 1, 2012 - Uploaded by Keelan Hawkins
VW Emissions Code P0411. .... VW 1.8T Secondary Air Injection Pump Replacement for Fault Code P0411 - Duration: 8:48. by Deutsche Auto ...

Nov 13, 2015 | Cars & Trucks

3 Answers

OBD test - Emissions test


hi ecudave, i will go for a tune-up / clean up; the injection system, intake and replacing the sparks, regular maintenance like this will surely clean you emmision. as per re[air cost or shop costs, that will still depend on which part to clean or to work on or even to replace like the spark, but it will not be more than $400.

hope that helps

Aug 05, 2008 | 1998 Audi A6

1 Answer

2005 keeps getting emission control v1v solonoid malfuncion


Clearing your so called codes, actually clears all stored data
that you need to diagnose the evap system

Seeing as how that systems monitors only runs every few days,
it will be awhile before a professional can work on it with the
proper test equipment,a scan tool.

You failed apparently to google the evap code, to see the possible
causes of that code being set.

Answer: hook up a scan tool.road test forever, until the evap
monitor runs,check for codes,smoke test the evap system,component test the failed solenoid & replace

Mar 19, 2014 | 2005 Chevrolet Cobalt

1 Answer

I have this code on my 1999 mustang v6 3.8 P0411 its the secadary air flow incorrect flow i replaced the egr vavle, vac. tubes spark plug wires the fuel filter. i just order the air/smog pump could that be...


The secondary air pump has failed and will need to replaced. The pump is an emissions component meant to help with cold start emissions. Replace it, clear the code & you should be fine. I hope this information was helpful.

Sep 04, 2011 | 1999 Ford Mustang Cobra

1 Answer

The check engine light is on and it failed the emission test. Someone told me that there is a way to get the problem code from the check engine light. Do you have any knowledge of this?


yes, the engine light on means your car has the obd2 code problem, you need a scan tool to check out the code, and I know this tool can help you car. or you can take your car to the local dealer to diagnose the code.

Jul 10, 2011 | Buick Park Avenue Cars & Trucks

1 Answer

What does code P0411, P2440 mean


P0411 Secondary AIR System Incorrect Airflow Detected
Possible Causes Setting Conditions
  • AIR pump pressure sensor reference (5v) circuit is open or shorted to ground
  • AIR pump ground circuit is open
  • AIR pump solenoid supply (12v) circuit is open or shorted to ground
  • AIR pump solenoid ground circuit is open
  • AIR pump relay coil control circuit is open
  • AIR pump relay coil power (12v) circuit is open or shorted to ground
  • AIR pump relay switch supply circuit is open or shorted to ground
  • ECM has failed

P2440 Secondary AIR System Switching Valve A' Stuck Open - With Automatic Transmission
Possible Causes Setting Conditions
  • AIR pump connector is damaged (check pins for damage, and for moisture)
  • AIR pump relay coil control circuit is shorted to ground
  • AIR pump solenoid power (12v) circuit is shorted to voltage
  • AIR pump relay switch supply circuit is open or shorted to ground
  • ECM has failed
  • both codes refer to emission & should be covered under factory warranty
  • good luck


Read more: Why am I having problems P0411 & P2440 w/ my 2006 Saturn Ion - JustAnswer http://www.justanswer.com/saturn/343l7-having-problems-p0411-p2440-w-2006-saturn-ion.html#ixzz1PyLeE07e

Jun 22, 2011 | 2009 GMC Envoy

1 Answer

I have a 02 xterra and did not pass the emission test. The code showing was knock sensor, I replace it, but still dont pass. SOS please 3300cc.


Codes do not tell you what to replace
They only tell you that a malfunction occured
Does not mean anything need replacing
Example: if you got an O2 Sensor code from a loose
vacuum hose ,would you change the sensor.
Most people would. I would diagnose and repair the hose,
letting in the extra oxy and leaning out my sensor.

What where the Emission Readings?

What did it fail for
HC,CO,NOX

Nov 24, 2010 | Nissan Xterra Cars & Trucks

2 Answers

Engine light came on and gave me a code 1757 what does it mean


P1757 is a transmission code. This one probably wouldn't have failed you in the emissions inspection. The P0442 will, though. The P1757 is a transmission governer pressure switch fault. Either the switch is bad, or the wiring to the switch is bad. If this was a history code stored in your computer, this may have been a one time occurance. If it's a current code, you will be looking at this circuit. It's easiest diagnosed with a scantool.

Sep 10, 2010 | 2004 Jeep Grand Cherokee

1 Answer

Emission test found some trouble codes


U0121 Communication error to ABS HU/CM

Apr 06, 2009 | 2005 Mazda 6

1 Answer

I NEED TO KNOW WHAT CODE P1518 MEANS. I FAILED MY EMISSIONS TEST, AND THAT WAS THE CODE THAT IT GAVE. THE DEALERSHIPS WON'T TELL ME WHAT IT IS WITHOUT ME TAKING IT THERE & PAYING.


Just a suggestion. Take it to your local Advance Auto Parts store.They will give you a FREE diagnostics test. They can tell you the problem, cost, and code meaning. I hope you the best.

Aug 04, 2008 | 2000 Ford Windstar

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