[Mrs_Mustang]

Strange...

For a while my 2000 Mustang was reading the code P0411, "Secondary Air Injection System Incorrect Flow Detected". The check engine light stayed on, but it did not affect the performance so I let it be... Now it's pulling the code P1413 "Secondary Air Injection System Monitor Circuit Low" and not P0411. Lately the car has been idling rough.

What could this be? Please help...

Mrs. Mustang (tnc112105@gmail.com)

[99mustang232]

more than likely your smog pump has failed for either two reasons... bearing failure or from water being sucked into the air inlet tube causing the motor to rust over. the smog pump is on the passengerside, in front of the wheel well. mine died also and threw the same codes, a replacement pump is around 180 from ford if i remember. the pump is only activated for the first 180seconds of startup to induce air into the exhaust manifolds to help promote buring of unspent hydrocarbon's which inturn improves emissions. the smog pump is also sometimes activated at idle momentarly. since we don't get smog tested where i live i removed it, and had the check enginge light turned off with aftermarket computer reprogramming from SCT. here is what the pump looks like:



unfortunetly ford did not design any type of drain hole for water/moisture to escape once introduced into the pump, it basically sits in the rubber cup at the bottom until it evaps or rusts out the electric motor. personally i think ford should of owned up and done a recall, because this appears to be very common, unfortunetly mine died shortly after i crossed 40k miles..

[Mrs_Mustang]

Thank you so much. I will make sure to change this, hopefully that will fix the problem.
Thanks again,
Mrs. Mustang

[scubasteve041186]

geez good to know thanks for the post 99mustang232

[00SoSlow]

ur so smart good post, did not know this

[Twist 2 Go]

this is a pretty common problem.

[99mustang232]

Originally Posted by Twist 2 Go this is a pretty common problem.

lol can we atleast get a recall??? guess someone has to die from it first?

[Mrs_Mustang]

Okay.... So I change the smog pump, disconnect the battery terminals, turn off the check engine light for a whole three days... I'm pulling P1413 (Secondary Air Injection System Monitor Circuit LOW Voltage) again... and P1414 (Secondary Air Injection System Monitor Circuit HIGH Voltage) ... Needless to say I'm a little confused... I don't think it can make up it's mind... I'm pulling both these codes at the same time...

Any ideas? Anyone?

Thanks in advance,
Mrs. Mustang

[hawxter996]

if you replaced your airpump you need to have the codes reset.

disconnecting the battery does not work, sorry.

mike e.

[GreenFaleen]

Get the codes reset and if they still come up it is probably your rear o2 sensor it is common code thrower in the 2000 mustangs it won't hurt anything. A tuner from SCT will disable them if your worried about it.

[Mrs_Mustang]

I didn't realize that the Oxygen sensors were part of the secondary air injection system... Besides, I think they have their own set of trouble codes around the 1100's somewhere. The CEL really doesn't bother me that much, but I have to get my car inspected in about two weeks. I was really kinda hoping that the air pump was the root of the problem. It was quite an easy fix considering... Anyways, thanks for the quick reply! Eventually I'll figure it out.

[GreenFaleen]

p0411 is commonly thrown by the o2 sensor activating the evap system and it getting stuck. That was my problem for awhile.

[xxrals22xx]

i have the same code idk what the hell to do to fix it

[Mrs_Mustang]

Where is this O2 sensor? Most cars usually have four right?

[GreenFaleen]

umm i;m actually not to sure where the rear ones are located I haven't really played around with the emissions system Juggalo_X probably knows if you wanna pm him

[Juggalo_X]

Originally Posted by GreenFaleen umm i;m actually not to sure where the rear ones are located I haven't really played around with the emissions system Juggalo_X probably knows if you wanna pm him

my ears were burning lol what year is his ride? and its a 3.8l obviously.

[GreenFaleen]

it is a 2000

[Juggalo_X]

Originally Posted by GreenFaleen it is a 2000

ok i know the first 2 are on the manafold by where the y pipe bolts up i know this cuz i was looking the other day and i beleive the other 2 are after the cats. if i had my Haynes Manuel here i would be able to verify 100% but i didnt bring my reading material to work today

[Mrs_Mustang]

Yeah, I had the codes reset and the CEL came back on an hour later. Its reading the trouble code P1413 again. I guess I'll change the O2 sensors in the back and see what happens. Does anyone know how to tell which one is bad? For $50 on Rock Auto it would be nice to have to buy only one.

[Juggalo_X]

Originally Posted by Mrs_Mustang Yeah, I had the codes reset and the CEL came back on an hour later. Its reading the trouble code P1413 again. I guess I'll change the O2 sensors in the back and see what happens. Does anyone know how to tell which one is bad? For $50 on Rock Auto it would be nice to have to buy only one.

not really, your rear sensors will throw any code except tellin you what one is bad lol aint that a bitch eh? best u can do is replace both and be done with it.