Secondary Air Injection Pump Issue
Thread Starter
Member
Joined: Jan 2019
Posts: 231
Likes: 10
2007 CL550
Secondary Air Injection Pump Issue
Hey I'm having an issue I'm trying to diagnose. I'm getting error code P0410 for the secondary air injection pump, the error will come back in a day or two if I clear the code. Also I know it isn't the pump as I can hear it when I turn on the car. It runs as it should and then turns off as it should. Then it proceeds to come back on at what seems like random times. It will turn on for maybe 10 seconds, then turn off for a few seconds, then turn back on for 10 seconds, then back off. I believe this pump is only supposed to operate when first turning on the car so what would cause it to run again and turn on and off? I tried replacing the pump relay and that didn't fix it.I also tried swapping out a air switchover valve and that didn't do it either. Any thoughts? Thanks!
Super Member
Joined: Feb 2007
Posts: 613
Likes: 294
From: Republic of Texas
W203 W212 W211 R53MCS
Just because it turns on doesn't mean that everything is OK. What you need is to do a chain function test with Xentry...... So that you can see what fails. Most of the time the pump is weak and can not pump enough air. This is why diagnosing properly is the way to go.
Thread Starter
Member
Joined: Jan 2019
Posts: 231
Likes: 10
2007 CL550
That's a good idea, I didn't know that was an option. I have access to Xentry so I'll give that a shot. I really don't think it is the pump though, this happened with the last pump too and I replaced the pump and the problem continues.
Thread Starter
Member
Joined: Jan 2019
Posts: 231
Likes: 10
2007 CL550
So I did do the air pump chain test and didn't get any good results. It only seems to test for the pump to be working when you start up the car (which mine does work). I still can't figure out what would cause the pump to come on repeatedly after driving for a while. Anyone else with guesses?
Trending Topics
Member
Joined: Jul 2019
Posts: 122
Likes: 41
2007 CL600
MB World Stories
The Best of Mercedes & AMG
6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)
Verdad Gallardo
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
Thread Starter
Member
Joined: Jan 2019
Posts: 231
Likes: 10
2007 CL550
Thanks for the link, I do know the system can be turned off but I'm trying to have that be the last resort. I'd prefer to figure out the issue and fix it and I have a backup engine so I can pull any parts I need. If it comes to it I'll disable it but trying to solve it first.
Member
Joined: Jul 2019
Posts: 122
Likes: 41
2007 CL600
Secondary air injection problems are fairly limited.
Pump runs, valves open, ecu checks that the lambda sensors detect the change.
An error would indicate a problem somewhere in the chain. You say the pump runs - it is fairly straightforward to test this using Star - you can pull off the hose that joins the pump to the valve assembly and you should be able to feel it blowing quite considerably (basically the opposite of a vacuum cleaner sucking).
Next, check for vacuum issues in the two lines that connect the two valves to the solenoid valve. The lines are quite short and easy to access (just remove the air filter housing and lift up the intercooler.
Finally you need to determine if the solenoid valve is operating properly. I think there is a guided test in Star for this.
Finally you need to determine the o2 sensors are also operating correctly.. although if they weren't I would assume you would get other problems so this seems unlikely to me.
Pump runs, valves open, ecu checks that the lambda sensors detect the change.
An error would indicate a problem somewhere in the chain. You say the pump runs - it is fairly straightforward to test this using Star - you can pull off the hose that joins the pump to the valve assembly and you should be able to feel it blowing quite considerably (basically the opposite of a vacuum cleaner sucking).
Next, check for vacuum issues in the two lines that connect the two valves to the solenoid valve. The lines are quite short and easy to access (just remove the air filter housing and lift up the intercooler.
Finally you need to determine if the solenoid valve is operating properly. I think there is a guided test in Star for this.
Finally you need to determine the o2 sensors are also operating correctly.. although if they weren't I would assume you would get other problems so this seems unlikely to me.
Thread Starter
Member
Joined: Jan 2019
Posts: 231
Likes: 10
2007 CL550
Thanks for the breakdown, like I said though the issue seems to be that the system is running too much. What would cause the pump to run again while I'm driving, not just at startup for 30 seconds. That is the part I'm really trying to figure out.
Member
Joined: Jul 2019
Posts: 122
Likes: 41
2007 CL600
Apologies, I thought the link I posted made it clear.
The system performs the I/M readiness tests. If unsuccessful (or a certain period of time has passed) it will continue to attempt the retest once certain criteria are met after start-up.
You can disable these diagnostic tests via Star.
The system performs the I/M readiness tests. If unsuccessful (or a certain period of time has passed) it will continue to attempt the retest once certain criteria are met after start-up.
You can disable these diagnostic tests via Star.
Senior Member
Joined: Aug 2018
Posts: 307
Likes: 61
S350 2008
Member
Joined: Feb 2017
Posts: 248
Likes: 36
From: L.A., Moscow, NYC, San Diego, Baja
1998 E320 Wagon, 2003 W211 E500, 2003 W211 E500, 1999 W210 E55 AMG
Are you saying these can be related?
Can one trigger the other, and which one?
Member
Joined: Jul 2019
Posts: 122
Likes: 41
2007 CL600
That sounds like you have a problem with the sensor/wiring in addition to the secondary air pump issue.
Member
Joined: Feb 2017
Posts: 248
Likes: 36
From: L.A., Moscow, NYC, San Diego, Baja
1998 E320 Wagon, 2003 W211 E500, 2003 W211 E500, 1999 W210 E55 AMG
It appears so. The code P2082-008 specifies the CEL. In reading ad nauseum, and just to make it interesting,an O2 issue is possible following a P0410. Replaced the long vac line between the two shut-off valves and saw more that need attention. Now that the sun is up it's time to get dirty (again).
