se5spd

hey so I have a 2006 c230 sport, it just failed smog and im wondering if someone could give me insight to why it did so?

everything passed except "air injection" failed. Im not quite sure what that means or how to go about fixing it (hopefully its cheap)

comprehensive visual pass - functional check failed - emissions test passed

if anyone has any ideas thatd be great.

thanks

LILBENZ230

The secondary air injection system pumps filtered ambient air into the exhaust for emissions purposes. If the SAI pump was not working you should have a CEL. Do you have a CEL on? If so you may need to replace the pump..

se5spd

Yes I do have a CEL, not sure what it is for but I can pull the code later tonight and get back to you. Is the pump an easy fix? Or does a mechanic have to do it? Also price wise, is it a lot?

Thanks!

Utahkompressor

The pump is $444 on rmeuropean. It's pretty easy to replace. However, you should check all the vacuum lines before changing the pump. When I replaced my cam magnet, I accidentally disconnected the vucuum line that goes into the solenoid and I got Air Injection Code right away. So, I believe it might be the case for your car too.

se5spd

Ok awesome I'll check that out!

vucuum line that goes into the solenoid, where is that?

Utahkompressor

Here you go...I just went out to take pictures from my car. Just check every hose and vacuum line that you see in the picture. Look for leaks or disconnected lines.

se5spd

do you own a kompressor model? I have the V6 sport model. Is it in the same location?

se5spd

Just pulled the code


P0073

Ambient air temp sensor


So does that mean my MAF could be dirty or my air filters are really dirty?

Utahkompressor

That's totally different code than what I got.

Ambient Air Temp Sensor is located on the front bumper next to the fog light.

Check your multifuction screen if the outside temp is not accurate, you might have a bad sensor...see the picture.

se5spd

yup, outside air temp says 185f lol.

front drivers or passenger fog light? Im gonna look tomorrow to see if I can see any dangling wires, etc. Anything out of place.

Utahkompressor

It's on passenger side (in the red circle).

se5spd

couldnt find anything that looked like a sensor?

Utahkompressor

From looking at your picture, you don't even have the wiring for temp sensor. Have you been in a front collision before?

FrankW

Outside temp sensor has nothing to do with emission.

Secondary air injection sounds familiar. If it is what i think it is, you need to replace the purge valve next to the esp module in the engine bay. You will have a pending error code of P0455.

Is there any pending codes when you pull the codes?

se5spd

Not that I can see only thing that comes up on the OBDII is

P0073

Ambient air temp sensor

I can double check but I don't believe there's any pending codes. Any idea where the purge valve is located?

se5spd

no pending codes.