Hello, I am new to this forum as I am a new crossfire owner. I love the car. Unfortunately, my check engine light came on with the code P2023 secondary air injection P0410 circuit short to +. I took it to a tech who tested the actual air pump to be good.


From my research here, it seems that this is a common issue and there is a chance that my relay control module is bad or has poor connections. Rather than resoldering etc, I think my best bet would be to just purchase a new module and replace it. I am a cisco guy, not a car guy so be easy on me. I am having trouble finding the part number I need for the RCM. A1705450305 is what I think it is. If someone could clarify this for me (or check out this listing for me real quick: http://www.ebay.com/itm/MERCEDES-W210-E320-1999-SLK230-ENGINE-CONTROL-COMPUTER-MODULE-OVERLOAD-RELAY-K40-/121254482951?pt=Motors_Car_Truck_Parts_Accessories&hash=item1c3b549407 ) it would be greatly appreciated.


Also if anyone has any advice on this air injection issue, I would love to be pointed in the right direction.


Again, I am not a big car guy but I am not intimidated by replacing basic parts myself.


Thanks in advance,


Cody

 

These are the numbers.
MB #170 545 03 05
Mopar #5099007AA
That one you have listed may, I repeat may work, a member did use another one and it worked.
The RCM can be fixed, either re-solder if the car stalls suddenly when hot and the starts when it gets cooler or replace the $5 relay for the air pump problems.

 

Yea, that would be me. I got that one for $25 on Ebay and the only difference I was able to see was that this part number has one fuse that is a lower amperage, I replaced with the fuse from the OEM one and it worked fine.
I bought it as a spare and did all the RCM fixes on it and used it until I could get replacement relays to fix the air pump problem on my OEM unit.

 

You guys are great thanks a lot for taking the time to help me out. I will order a relay and a cheap replacement RCM from ebay and see how it goes. The check engine light is pretty annoying.


Thanks again!