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Check Engine Light - 2002 C230 Kompressor

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Old Nov 18, 2015 | 10:13 AM
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Mercedes C230
Check Engine Light - 2002 C230 Kompressor
Hello Everyone,

I have a 2002 C230 Kompressor and have had the check engine light on for some time. The codes are as follows:

P0102 Mass or Volume Air Flow Circuit Low Input
P0141 O2 Sensor Heater Circuit Bank 1 Sensor 2

I have replaced the following parts:

Mass Air Flow Sensor
Both O2 sensors
EGR valve
Hose from the oil overflow to the top of the manifold

I also emptied the oil from the overflow area. I have failed an emissions test and am required to repair the vehicle. Any suggestions would be helpful.

Thanks
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Old Nov 18, 2015 | 11:02 AM
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2004 Civic Si. FWD for the Win!
Is the cat original?
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Old Nov 18, 2015 | 12:55 PM
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Mercedes C230
The catalytic converter? I'm not sure. I purchased the car second hand.
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Old Nov 19, 2015 | 01:32 PM
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Mercedes C230
Anyone else encountered and resolved this problem?
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Old Nov 19, 2015 | 01:35 PM
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JBs C63 PP( wifes car ), Mc Laren Pxx(toy), 2013 Mustang GT 5.0 ( DD ), ML 6.3 ( winter DD )...
hmmm check the battery voltage...might be a little low battery gremlin...
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Old Nov 19, 2015 | 02:53 PM
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Mercedes C230
It's a brand new battery. The car is a little rough on idle, occasionally bouncing slightly when stopped.
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Old Nov 19, 2015 | 02:58 PM
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Originally Posted by libero4
It's a brand new battery. The car is a little rough on idle, occasionally bouncing slightly when stopped.
Brand mew battery doesn't mean it's fully charged, nor properly registered.
Check it and we go from there
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Old Nov 19, 2015 | 07:51 PM
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Battery is fully charged.
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Old Nov 20, 2015 | 03:41 AM
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Originally Posted by libero4
Battery is fully charged.
Come on man?
Shed some light with a little video!
I hate pin pointing in the dark.
If your battery is good, MAF & EGR got replaced
Your idle is jumpy ...
I would check/ replace
Catalytic converters
Check if the fuel filter & line's isnt/ aren't clogged.
Make sure you got GOOD, fresh, new gas in your tank.
If the problem still occurs do an compression test, might be the cyl. head gasket.
Last edited by vsix; Nov 20, 2015 at 03:58 AM.
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Old Nov 20, 2015 | 02:30 PM
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Mercedes C230
Thanks. I changed the fuel filter earlier this year but need to check the catalytic converter. That would be a costly replacement.
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Old Nov 20, 2015 | 05:57 PM
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Originally Posted by libero4
Thanks. I changed the fuel filter earlier this year but need to check the catalytic converter. That would be a costly replacement.
You're welcome
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Old Nov 21, 2015 | 12:31 PM
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2004 Civic Si. FWD for the Win!
If you're not in CA, I'd suggest a Magnaflow cat if you need a new one. I used one for years without problem, and the price difference is huge.
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