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  • SN95 4.6L Mustang Tech

OBDII code P0412

  • Thread starter Thread starter 5111
  • Start date Start date Nov 26, 2004

5111

Founding Member
Oct 1, 2002
638
0
0
DFW, Texas
Nov 26, 2004
#1
  • Nov 26, 2004
  • #1
I have a 2001 Bullitt Mustang GT that is supercharged.

My check engine light came on so I took it down to Autozone to have them run the codes. It came back with code P0412. When I referenced it on http://www.bullittarchive.com it said:
P0412 - Secondary Air Injection (AIR) system upstream flow----See DTC P1411

So I look up P1411 and it says:
P1411 - Secondary Air Injection (AIR)system downstream flow

The secondary air injection system does not detect the presence of air in the exhaust when introduced by the secondary air injection system

*Electric AIR Pump
*Hose from AIR pump leak
*AIR bypass solenoid leak/blocked
*Hose from AIR pump blocked
*AIR bypass solenoid stuck open/closed

In order to test the AIR pump, it must be capable of driving the HO2S lean.

I can't find any vacuum leaks, so what should I check now?
 

rustang04

Banned
May 4, 2004
239
0
0
Nov 26, 2004
#2
  • Nov 26, 2004
  • #2
have someone shut the rear o2's off and see if it comes back after erasing all codes in memory
 

5111

Founding Member
Oct 1, 2002
638
0
0
DFW, Texas
Nov 26, 2004
#3
  • Nov 26, 2004
  • #3
rustang04 said:
have someone shut the rear o2's off and see if it comes back after erasing all codes in memory
Click to expand...
I am running MILs and am pretty sure that my tuner already turned them off.
 
B

bdcardinal

tree hugger
Jun 10, 2003
3,612
16
69
santa barbara, CA
Nov 26, 2004
#4
  • Nov 26, 2004
  • #4
stupid question, but i dont think the SOHC 4.6 motors have AIR. i thought only the older 4v motors had them. reason i say this is because i did a training smog on my car and there isnt AIR injection on my 98gt.
 
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