idiotter

I know this is a popular topic and trust me, I've read most of them til the wee hours of the morning. I was wondering if anyone else has recorded the freeze frame numbers for comparison. I'm not sure what the numbers are supposed to be reading during normal operation, but maybe if there was a pattern this code would be easier to diagnose.

Here are my last two P0410 mod$10 freeze frames:

Eng Speed 525 550 rpm
Calc load 23.1 22.7%
MAP 58 57 kpa
Coolant 192 190 *F
ST FTRM 1 2.3 3.1%
LT FTRM 1 -7.9 -6.3%
ST FTRM 2 -0.8 -0.8%
LT FTRM 2 -4.7 -3.2%
Veh Speed 0 0 mph
Fuel Sys 1 N/A
Fuel Sys 2 N/A

Also, all the monitored parameters are READY except for the Evaporative System.

Does the MB shop manual have any specifications or descriptions concerning normal operating parameters? I can't seem to find any information in that program either; of course, its not the easiest program to fumble through.

Lenin

What exactly is your question? P0410 is a secondary air injection system malfunction. It can be the pump itself, the wiring or the switchover valve. It can also be the fuse that drives the pump. It can also be other things. The params that you posted will not help you trouble shoot the P0410.

Zeppelin

If you are trying to get the 0410 code to go away I would remove the relay and then pop the plastic over off of it and see if the contacts are melted. If so replace it. If not then put battery voltage to the pump to see if it runs, if not replace it.

idiotter

Your suggestions are all on my list of possible suspects I've found from different posts. I know it gets annoying when noobs ask questions without researching but I wasn't sure if any of those reading would point to a probable cause. I'll get on those fixes to see if I can find the issue. Thanks for the help and I'll update with anything I find.

idiotter

**UPDATE**

I did some troubleshooting today. Found pump works good when 12v applied to contacts; relay is good (new); fuse good; plenty of air pressure from pump at valves; vacuum hoses all good.

Some water came blowing out of the hoses at valves when pump turned on...not a ton but enough to make me wonder.

I still need to check power and grounds and vacuums but will get to that when I get a chance.

I came across a pretty good video that gives some troubleshooting tips for the secondary air system. Its a different kind of car but pretty useful none the less.

http://www.youtube.com/watch?v=dIrmk...eature=related

ALLDATAdiy INFO

Anymore updates?

idiotter

Well, maybe someone could help me out. How do the how do the diverter valves work? The pump blows are into them but open and close with vacuum? I could not blow air into the valves where the pump hoses connect but am not sure if this is normal. Is it possible for those to get clogged? Sorry in advance if I'm missing something obvious. Also, what is the component where the check valve is connected below the left valve?

ohlord

little blue check valve is hooked up via an electrical connection and a small hose to the blue valve it is the electronic switch over valve.
Per above none of your freeze frame data will help
the sec air is strictly emissions related to heat the cats upon cold start up.
If all is working and you hear the pump at start up in the morning
then that water you noticed is the issue and has rusted the flap valves in the Vacuum cans.
You can remove them and rebuild The reed valve and clean the passages into the exhaust or buy new.
I prefer the first what you do is at your comfort level with Diy tasks.

idiotter

That was excatly what I was wondering. Thanks! I will try to rebuild them today if the weather clears up.

BTW, those things are about $150 each....think I'll go for the diy first.

Here is an article from Benzworld that talks about the cleaning of those valves. Scroll to page 5 for pics

http://www.benzworld.org/forums/w163...injection.html

idiotter

So far today.....

Removed and checked the diverter valves, or the air injection combination valve as MB service manual calls it. The reeds looked fine, weren't rusted shut and the interior valve opened and closed good.

Checked the passages for carbon build-up...might have been clogged but I'm not sure because I cleaned it before I actually took the mount off. Felt like i might have punched out some build-up though.

Ensured vacuum at electronic switchover valve

Checked all vacuum lines for clogging

I still haven't heard the pump come without me jumping it, but usually don't have time in the mornings to check.

Next I'm going to jump the swithover valve to see if it actuates....but not today, I'm spent.

idiotter

realog

I have the same code(problem) on my ML320. Is this problem a universal problem? Please keep posting, I want to see what your fix turns out to be.

idiotter

From what I've seen its common on a lot of different cars but seems more common with MBs, especially ones with the 3.2 liter.

It's been a couple days since I cleaned the valves and no CEL yet. I'll keep you posted. Usually takes a couple of days so I'm not holding my breath.

c32used

Interesting thanks

meatball66

Gents-
I've been trying to kill the P0410 for 3 months. I get simialr freeze frame data. I sure do not understand the input above that the freeze frame data is irrelevant. If not, what does the scanner give you this data? In my case it is absolutely the parameter values the instand the code gets thrown.

I have confirmed:
1) all compoentets of my AIR system are working as expected (pump on/off, vacuum on/off, diverter valves open/close, etc.)
2) I have disassembled the whole system, cleaned out the carbon build up
3) OBDII real time scan with engine running shows the O2 sensors all responding, as well as MAF, MAP
4) Scanner reveals Fuel trims moving within range in response to H02S11 and HO2S21

YET
The P0410 code gets thrown after I put about 30-70 miles on the car after a reset and ALWAYS while I sit at idle at a stop light after the engine is fully warm (in closed loop mode).

Ideas?

hondee

If you are sure all the items are tested--you may have the passages in the heads plugged. I had 320000 on mine tried everything then noticed poor flow of air through the head. had the heads reworked and the problem is gone. Touch expensive but problem solved. So be sure you have flow of air through the head if all else has failed.
Also there is a post somewhere about other engine problems that will cause the code to show up--TOTALLY UNRELATED TO THIS SYSTEM. it is a MB!

jvakos

I had that code come up several times and my charge air pump would get stuck continuously running. I took it to my Indy shop and they rebuilt the pump for 150 bucks or so and its never been a problem since. That was 3 years ago and was at 105k miles on a 2003 c32.

Never did any extensive research into this as an issue SI nce the shop fixed it for cheap so perhaps a cleaning and rebuild could help.

Morphh

The pump fails cause the relay fails, check relay and fuse for air pump