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I have a 2001 SLK 230 Kompressor. The check engine light stays on. The code for this is P0410. Can any of you guys give me a step-by-step fix for this problem.

Scoope:(
 

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I'll look it up in the repair manuals. For now, I found this: (although for GM, OBDII codes are the same)

What does that mean?
The P0410 code refers to the emissions system. The AIR pump puts air to the exhaust to lower emissions. It takes in outside air and pumps it through two one-way check valves into each bank of the exhaust.
About 90% of the time that this code is set, the one-way check valves have worn out or failed and allow water (which occurs naturally in the exhaust) back into the pump. In any cold climate, especially in climates with higher humidity, this water may be more excessive. The water partially fills the AIR pump, it can then freeze. When the PCM commands the pump on, if the pump is frozen it cannot turn, thus overloading the circuit and "popping" the fuse.
Symptoms
Possibly symptoms include:
• MIL illumination obviously
• Hesitation on acceleration
• Noise from a bad/stuck AIR pump
Causes
A code P0410 may mean that one or more of the following has happened:
• Water may have collected in the AIR pump or the vent solenoid and frozen or corroded the pump
• Blown AIR pump fuse due to freezing up
Possible Solutions
Note: There is a technical service bulletin (TSB) regarding this code for a number of GM models. The TSB calls for the replacement of the AIR pump and the installation of a new secondary injection hose. The TSB can be found on this ACDelco site.
Additionally, if you simply replace the AIR pump the problem may return again (and again). If you replace the pump, also clean out the hoses and replace the one-way check valve. If this is on a GM model that the TSB applies to, follow those instructions in the link above. In a few cases, people have put a small hole in the rubber cover on the pump which allows any water to drain out.
Also, please note that this may be covered under the emissions warranty on the vehicle. If your vehicle is out of bumper-to-bumper warranty, check if the emissions warranty is still valid!
• Replace the AIR pump AND one-way check valve
• Test and clean the AIR pump AND test and replace the one-way air check valve
• Replace the AIR pump inlet hose
• Replace the AIR pump fuse (found under the hood)
 

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Sorry Scoope, the manual just refers to diagnostic equipment. Kind of a POS manual that I got of fleebay.
 

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check the engine on the passenger side front.There are a couple of vacuum hoses coming from under the plastic front engine cover.Remove the cover and check the hoses,also the little canister check valve my be rusty inside.You may need to replace some brittle hoses.make sure you put the hoses back on the right way.I think this area is your emissions and will send codes.
 

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Contact me at [email protected] if you would like to join our NC/SC SLK Group. We're up to 50 members now.

Len
 

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For me the P0410 was caused by a corroded air pump check valve.
My original valve part # is 0021402860. That was replaced by a newer 0021406860.
I found an older check valve 0001407860 for $20. Tried it out for several weeks and the P0410 is gone for now. Let's see how it goes. If the older valve 0021406860 doesn't work, I will go for the newer 0021406860.
To remove the valve, you will need a 27mm or 1-1/16" low profile wrench.
 

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1998 SLK230 with error code P0410

First, thanks to this forum for assisting me in solving this check engine code.

The responses (and the dealer) pointed to one of three possible causes for replacement: 1. faulty air pump (yes this vehicle has as Auxiliary Air Pump that essentially forces air into the exhaust pollution system to help oxidize unburned hydrocarbons for lower emissions). 2. The check valve for the above (part #00 214 068 60). 3. The relay.

After the dealer suggested replacing them one by one until the (intermittant) check engine code stopped, I turned to you guys and Pelican Parts online who has an excellent set of photos and steps to diagnose the relay.

I started there. The relay is part of a 4 relay assembly (part #210 540 00 72) on a printed circuit board, and costs about $200. It is easily accessed and I discovered and resoldered a not-obvious bad solder joint. It was not one of the components populating the printed circuit board, but one of the larger copper metal leads from the fuses where it is soldered to the board and extends vertically. The joint, though appearing good was bad because the solder had not fully flowed onto and up the thicker (and heat absorbing) copper.

Good luck to anyone else who solves this problem.
 

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Also my 2001 car (SLK r170 200 kompressor evo) sometimes gets the 410 error.
This happens 4/5 times per year (on average I do 10.000 miles every year), never in the summer.
It always happens with the engine at a temperature of 85/86 celsius degrees (normal working temperature) and at idle (750/800 rpm).
Any suggestion?
 

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What fuse for secondary injection air pump

I have a 1999 SLK230 with a P0410 code turning on the check engine light. From the discussion so far the cheapest and easiest fix might be to change a blown fuse but I can't find any info on which fuse it is. The owners manual is useless, all it does is show the locations of the 2 fuse panels. The cards on the inside of the lids of the panels don't list a fuse for the secondary air injection pump. Can anyone out there tell me which fuse controls the secondary air injection pump?
 

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I have a 1999 SLK230 with a P0410 code turning on the check engine light. From the discussion so far the cheapest and easiest fix might be to change a blown fuse but I can't find any info on which fuse it is. The owners manual is useless, all it does is show the locations of the 2 fuse panels. The cards on the inside of the lids of the panels don't list a fuse for the secondary air injection pump. Can anyone out there tell me which fuse controls the secondary air injection pump?
fyi, this thread is 6 years old
always better to post a new thread

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I have a 1999 SLK230 with a P0410 code turning on the check engine light. From the discussion so far the cheapest and easiest fix might be to change a blown fuse but I can't find any info on which fuse it is. The owners manual is useless, all it does is show the locations of the 2 fuse panels. The cards on the inside of the lids of the panels don't list a fuse for the secondary air injection pump. Can anyone out there tell me which fuse controls the secondary air injection pump?
Did you find the fuse and fix it?
 

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Hello,

I have the same problem, and I am not a able to loosen the secondary valve it is rusted on the pipe, tried everything... did nit tried the torch.... my car is a 2001 slk 230 does anyone have a suggestion on how to disconnect the pipe from the exhaust manifold, I cannot see the bolt from the top of the engine.

Thank you,

::a
 

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I had that error code on my 2002 SLK320. My Bluedriver Bluetooth OBDII reader stated that it could be a faulty K40 relay. I cleaned up the contacts on the relays and that fixed the P0410 error, but then I had some O2 sensor codes. Replacing the K40 relay (approx $160) has resolved all codes, and the car has been running smooth and strong ever since.
 

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this thread is almost 10 year sold
closing it
 
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