Fault Codes......Could the problem be....

Trueblue1872

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Hello again folks,

after getting an intermittent engine management light on my w203 c180 Kompressor i decided to dive in at the deep end and purchase an OBD2 Scanner tool. i have been since still getting the intermittent light after clearing the codes. they are as follows:-

P0101- Mass/Volume air flow A circuit range performance
P0102- Mass/Volume air flow A circuit low
P0172- System too Rich Bank 1
P0171- System too Lean Bank 1

my question is this, all of my ideas point to a fault MAF sensor, but i was wondering could the problem be caused by an oil leak?

any info would be greatly appreciated.

thanks guys!!
 

LostKiwi

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It needs the live data analysed.
It could be MAF, lambda sensor, clogged cat, air leak in the intake after the MAF etc.

Highly unlikely to be related to an oil leak unless it's oil from the camshaft position sensor/actuator leaking into the loom.

Pull the ECU plug and check for oil. Also check the Lambda sensor connector.
 

Craiglxviii

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What scanner did you buy?
 
OP
Trueblue1872

Trueblue1872

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It needs the live data analysed.
It could be MAF, lambda sensor, clogged cat, air leak in the intake after the MAF etc.

Highly unlikely to be related to an oil leak unless it's oil from the camshaft position sensor/actuator leaking into the loom.

Pull the ECU plug and check for oil. Also check the Lambda sensor connector.
Kiwi thanks for that info. I think my mechanic is going to run a live analysis on monday.
 

Botus

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its normal for something on the supercharger to give up... I expect there's a designed to fail sensor somewhere which could probably get repaired

neighbours had issue one day perfectly normal, next day limp mode... dealer said needs a supercharger, owner fitted a second-hand one and it was back to normal... (nothing mechanical wrong as far as I know)
 
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Trueblue1872

Trueblue1872

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its normal for something on the supercharger to give up... I expect there's a designed to fail sensor somewhere which could probably get repaired

neighbours had issue one day perfectly normal, next day limp mode... dealer said needs a supercharger, owner fitted a second-hand one and it was back to normal... (nothing mechanical wrong as far as I know)
How mych would tht cost. Be aswell buying a new car.
 

Craiglxviii

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LostKiwi

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So the codes showing arent accurate?
It will only read a subset of the codes the car may record.
There are generic codes (as mandated by US laws for checking emission related fault codes) and manufacturer specific codes. A generic reader like the Foxwell NT201 will only read generic codes and perhaps a subset of the manufacturer engine codes. It won't read other modules such as transmission, Aircon, SAMs, ABS, ESP, airbag etc correctly if at all. For MB specific codes you need a reader that can interpret manufacturer codes and talk to all modules.
 


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