Service Engine Soon

[tardboy21]

hey, my service engine soon light cam on my 98 SHO. its got a little over 81k miles and it seems to run fine. its was a little low on oil so I topped it off but it is still on. I'm gonna get the code read tommorrow, but are there any common problems that may cause it to come on?

 

[NebraskaSHO]

There are alot of reasons it could go off.

My guess, P1744

 

[tardboy21]

Code P0411 : The PCM has determined that the flow detected in the secondary air injection system is incorrect for the current engine operating conditions.

 

[tardboy21]

i found the first post on the P0411 code, but i have a few other questions.
It just passed inspection last month so I'm good for two years, but what will happen if i don't replace it soon?
It shouldn't hurt the cats should it?

Also, do i have to replace just the relay or the whole unit?
If i pull the car up on ramps and start it up, will i hear the unit run if its the relay?

Lastly, I don't know if this has anything to do with it, but since i got the car two months ago, the ABS light would intermittently come on while driving. Nothing is effected or changes when it comes on.
I noticed in the other post that the unit is located by the ABS, could this be whats affecting it?

 

[SHOZ123]

Other than the annoying light it has no performance or durability affect on the engine. I have some 24v waring lamps if you get tired of the brightness of the bulb.

The problem is probably the relay mounted on the pump bracket. Same as the Duratec so I would look for a used one some where.

 

[JoesSHO]

they are however a b***h to get to... Won't hurt anything.