PCM P0410 Secondary Air Injection System Malfunction

[codewize]

No one working on the water pump but I had the cover off looking around and cleaning stuff. I'll go out in a minute and look around. Maybe I knocked something loose.

[dp102288]

Code, the vacuum does sound like front left from the engine on the SLS.

Is this the sound you were referring to in the other thread? Cause our SLS makes 2 sounds in relation to this. The hoover on the outside, and the dremel on the inside, mostly from the air vent above the headlight switch.

[codewize]

Ok I think I found it. The vacuum T was unhooked near the rear cam cover.

As an FYI to everyone, it's pretty easy to knock this off when replacing the engine cover.
Thanks everyone for your help.

DP, I understand you're hearing 2 different noises. I think for me this was the one I was hearing. I can hear it inside the car too but I really think it's only one noise. I'll bet you're also hearing that little fan. Interesting that it's all the way to the left though.

[ewill3rd]

Yeah, if that vacuum line is unhooked the check valves won't open and you'll get a P0410 every time the test runs.

Here are the enable criteria for the P0410 self diagnostic. That means all these conditions must be met in order for the test to run:

Passive tests:

• The engine is running.

• The engine speed is more than 600 RPM.

• The throttle is steady

• The engine load is less than 80 percent.

• The system voltage is more than 10.5 volts.

• The MAF is less than 35 g/s.

• The air fuel ratio is more than 12.5:1

• The ECT is between 5°C (41°F) and 110°C (230°F).

• The IAT is between 5°C (41°F) and 60°C (140°F).

• The power enrichment, or the deceleration fuel cut-off function is not active.

Active Tests

• The engine is running.

• The engine speed is more than 600 RPM.

• The throttle is steady

• The engine load is less than 80 percent.

• The system voltage is more than 10.5 volts.

• The MAF is less than 35 g/s.

• The fuel system is in closed-loop operation.

• The EVAP purge is active.

• The ECT is more than 68°C (154°F).

[clarkz71]

In between the first version belt drive pumps and the new electric pumps there was a mech/electrical version. Late 80's early 90's Mercedes had a belt drive pump with a clutch, similer to an a/c clutch. It ran about 90 sec. Sounded just like the a/c cycling on & off.

[dp102288]

Originally Posted by codewize

DP, I understand you're hearing 2 different noises. I think for me this was the one I was hearing. I can hear it inside the car too but I really think it's only one noise. I'll bet you're also hearing that little fan. Interesting that it's all the way to the left though.

Yeah! I can hear the hoover in the car no matter the outside temp, but the dremel comes on in frigid temps only.

[ewill3rd]

Maybe it sounds more like a Kirby?

[dp102288]

Our Oreck sounds just like out SLS...

[ewill3rd]

I haven't heard an oreck yet... I might need to buy one

[codewize]

OK well guess what. I drove the car today for the first time since the alleged fix. Before I got out of the driveway the SES light came on with the same old P0410. So I said screw it. I'll have it looked at later.

Well I got down the road a bit and I smelled a very strong burning electrical smell. I figured it was the pump we're discussing so I kept driving.

No code and no problems the rest of the day. I'm guessing the pump is bad even though I found a vacuum hose off. It's going to the dealer as soon as I can get it there. No warranty so wish me luck.

[dp102288]

^^ Damn. Good luck at the dealer though!

[codewize]

I think I've got some bigger problems than this too. If anyone has been watching the Oil Pan Gasket Leak (Oil pan gasket leak!) thread or the Burning Oil Smell (Burning Oil Smell???)in the Seville / Eldo threads you'll see my most recent posts.

This really sucks for a car with such low mileage

[dp102288]

[codewize]

So I think the system was freaked out when the vacuum line got plugged back in. I haven't seen the SES light since this last post. Thank goodness.

Now on to getting a warranty to cover the oil leak.

[WyEldorado]

I read all the post on this thread since I got the code in my 2002 Eldorado, ETC and took it to a shop where they informed me the back air injector valve was bad and needed to be replaced. They used a scan tool and followed the guide so hope its correct and not also a air pump since the vehicle was warm when I took it in. I have since ordered the valve through the dealer since couldn't find the valve any cheaper. My question is has anyone ever took the valve apart and cleaned it? Or is that a option? I just bought the car and the Service Engine Soon Light came on the way home so don't have any history. Thanks in advance and have learned alot on the CAD Forums.

Bud

2000 Eldorado ESC Diamond White
2000 Eldorado ESC Misty Bronze
2002 Eldorado ETC Pearl White