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P0172 and P0175

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Old 08-28-2017, 04:45 AM
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CLK 350
P0172 and P0175
Hey Guys,

i have a small problem with my CLK 350. My first problem was the error P2006 and I changed the intake Manifold. But after the i got new errors P0172 and P0175.
My first thought was the MAF and O2 Oxygen Sensor, so I checked it but they were not.

I think it false air or?

thanks a lot for yours help...



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Old 08-28-2017, 03:55 PM
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Have you cleared the faults?---------and did they come back!
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Old 08-29-2017, 02:38 AM
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Originally Posted by Plutoe
Have you cleared the faults?---------and did they come back!
Yes, but the faults come back after 30 km.I have seen yesterday on the right side of the motor ground cable is torn.
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Old 08-29-2017, 08:30 PM
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Check ALL vacuum hoses. This can be caused by the pressure sensor getting an erroneous reading.
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Old 08-31-2017, 03:02 AM
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Originally Posted by Rudeney
Check ALL vacuum hoses. This can be caused by the pressure sensor getting an erroneous reading.
Thank you for the helpful tips.

I think I have a leak in the bend.

Is it possible to test the sensor?
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Old 08-31-2017, 09:51 PM
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I'm not aware of a specific test, but if there are no vacuum leaks, then the sensor itself could be bad.
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