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Mercedes Benz C220 2004 - Code P2078 Intake manifold tuning (IMT) #

Posted by Mike Burgess on August 30, 2011, 8:21 pm

Year of Manufacture *: 2004
( Optional ) Engine Code or CC: OM646963 2100cc

Hi again.

I had a Mercedes C220 came in today with power loss, and a code reading of P2078. Intake manifold tuning (IMT)position sensor/switch circuit high.

I have tried to see what and were the sensor is but Auto Data not very help full. The customer could not stop long enough for me to carry out any further investigation at that time. Can any one shed any light on this one.

Thanks

Mike

Re: Mercedes C220 P2078 code

Posted by Alan Kane <iframe src='https://members4.boardhost.com/ukautotalk/info/user=alankane' width='330' height='300' border=0 style='border:none;'> on August 30, 2011, 8:34 pm, in reply to "Mercedes C220 P2078 code"
Alan Kane - Administrator

That another case of poor fault code description written into scan tool software. The code most likely refers to the intake manifold shut off motor. The motors can give trouble but you can get a code that faults the motor due to low air flow signals. You need to check the operation of the motor and the butterflies it controls before faulting it.

Re: Mercedes C220 P2078 code

Posted by Mike Burgess <iframe src='https://members4.boardhost.com/ukautotalk/info/user=ukat3060' width='330' height='300' border=0 style='border:none;'> on August 31, 2011, 8:05 am, in reply to "Re: Mercedes C220 P2078 code"

Thanks Alan I will book the car back in,check it out first and report back.

Re: Mercedes C220 P2078 code

Posted by sean savage <iframe src='https://members4.boardhost.com/ukautotalk/info/user=UKAT5559' width='330' height='300' border=0 style='border:none;'> on September 1, 2011, 12:27 pm, in reply to "Re: Mercedes C220 P2078 code"
Sean Savage

look in the archives mike i did one of these a few months back. the motor is under the inlet manifold,starter off to replace if i remember rightly (1hr ish) motor was about £130 from merc. as stated check the flaps move freely when motor removed and it may have blown the fuse aswell.
sean

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