c32 secondary air injection malfunction - Mercedes-Benz Forum
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#1 (permalink) Old 03-23-2010, 08:07 PM
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c32 secondary air injection malfunction

hey, hooked up my car to the computer and got this code malfucntion. c32 79k on it. whats the best way to check if is the entire bulb or just a fuse or valve? I have noticed some lost of accerlation. the check engine light went on, while i was doing like 70 mph on the highway. I had the kid who used the machine clear the code.
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#2 (permalink) Old 03-24-2010, 07:50 PM
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The air pump is known to fail, and it's in no way a cheap part ($650+). There's also the possibility of the fuse or relay (maybe one unit - relay) blowing, but this is normally caused by the pump starting to go. Best way to diagnose is through STAR diagnostics.


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#3 (permalink) Old 04-24-2010, 02:12 PM
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Post Air Injection Pump

I own an 02 C32 AMG and recently the check engine light has come on and the problem is the air injection pump. Also since the light has come on I have began to feel a hard shift between 1st and 2nd gear. It is even worst at low speeds. The MB dealership says that the pump is causing it all and a new pump will fix the problem. I don't understand how a pump that feeds air into the exhaust can cause the car to shift so bad. Has anyone else had this problem?????
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#4 (permalink) Old 04-24-2010, 11:21 PM
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It wouldn't... The bad shifting might be due to glycol contamination of the transmission. The original Valeo radiator is known to leak coolant into the transmission. Dealership can perform a glycol contamination test, or you can take your own sample, and send it off to black stone labs.


2002 C32 AMG Sedan [111,000 Miles]
Clear Side Markers | CL Style Grille | Flat Emblem | CF Front Lip Spoiler | CF Rear Diffuser | CF Trunk Spoiler
K&N Air Filters | NGK IX (2 Step) | KV-85 | LET 185MM & ECU | TVT Thermostat | PSK Belt Wrap | CM30
DIY Intercooler Isolation | 26x7x2 FB H/E | Intercooler Reservoir | Battery Relocation | Lorinser Sides
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#5 (permalink) Old 02-27-2011, 11:44 AM
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Possible dumb question, however.... how does the radiator leak into the transmission?
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#6 (permalink) Old 02-28-2011, 07:44 AM
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Anyone have the part number for the secondary air pump and also the relay fuse?

My CEL light is on and throwing this code. Just moved to CA and smog test got me. Automatic fail is what I am told when CEL is on with this code. Before heading into to stealer wanted to get my info in order.
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#7 (permalink) Old 03-01-2011, 10:51 PM
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hey guys i have a c32 amg its '03. I'm having the same problem with my car. I checked with the dealer they said its the Secondary Air Injection System... ive been reading these posts some people are saying that their cel stop appearing after they replace the relay. Can some one point out where the relay is located so i can take a look at it.
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#8 (permalink) Old 03-01-2011, 11:20 PM
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Possible dumb question, however.... how does the radiator leak into the transmission?
The transmission oil cooler is an integral part of the radiator and a leak between the two is therefore possible and has happened quite often.

ERIC.

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#9 (permalink) Old 03-01-2011, 11:29 PM
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Originally Posted by C32JET View Post
Anyone have the part number for the secondary air pump and also the relay fuse?

My CEL light is on and throwing this code. Just moved to CA and smog test got me. Automatic fail is what I am told when CEL is on with this code. Before heading into to stealer wanted to get my info in order.
Engine compartment left, click to enlarge. (N10/1)
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ERIC.

___________________________________________
"I am enclosing two tickets to the first night of my new play; bring a friend, if you have one."
- George Bernard Shaw to Winston Churchill.

"Cannot possibly attend first night, will attend second ... if there is one."
- Winston Churchill, in response.
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#10 (permalink) Old 03-01-2011, 11:41 PM
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Sorry I forgot to say the relay box pic is for the W203 C32 AMG Kompressor.

ERIC.

___________________________________________
"I am enclosing two tickets to the first night of my new play; bring a friend, if you have one."
- George Bernard Shaw to Winston Churchill.

"Cannot possibly attend first night, will attend second ... if there is one."
- Winston Churchill, in response.
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