E-Class (W212) 2010 - 2016: E 350, E 550

P2185 p2189 help

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Old 10-08-2019, 06:22 PM
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2011 E550
P2185 p2189 help

I have a 2011 E550, and have two codes being thrown P2185 "idle speed is to high when engine is warm", and p2189 idle speed control short to ground. I can't find any information on these. Any insight would be appreciated. Thanks!
Old 08-17-2023, 08:28 AM
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2011 e550 4matic, 89 944 turbo, 74 super beetle, 00 4runner 5sp
Originally Posted by Dustin812
I have a 2011 E550, and have two codes being thrown P2185 "idle speed is to high when engine is warm", and p2189 idle speed control short to ground. I can't find any information on these. Any insight would be appreciated. Thanks!
did you ever find a fix for this?
Old 08-17-2023, 03:44 PM
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MY'14 W212 M276 3.5NA @55kMi
Faults for idle too high ....

This is a MAF engine right...

Idle too high means vacuum leak from... crankcase breather or a popped rear camshaft plug?

Any recent work done... intake seals?

See that throttle body is nearly clean to seal idle air.
Old 08-17-2023, 11:38 PM
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2011 e550 4matic, 89 944 turbo, 74 super beetle, 00 4runner 5sp
Originally Posted by CaliBenzDriver
This is a MAF engine right...

Idle too high means vacuum leak from... crankcase breather or a popped rear camshaft plug?

Any recent work done... intake seals?

See that throttle body is nearly clean to seal idle air.
Thank you for your response. I'll look into it this weekend. I recently (2k miles ago) replaced the crankcase breather along with the rear camshaft plugs (a kit from FCP Euro). I'll inspect my work this weekend get my eyes on the throttle body.

I havent had a check engine light on, just a code stored in the ECM.
Old 10-03-2023, 02:29 PM
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2011 E550 & 2014 ML350
Originally Posted by raz108
Thank you for your response. I'll look into it this weekend. I recently (2k miles ago) replaced the crankcase breather along with the rear camshaft plugs (a kit from FCP Euro). I'll inspect my work this weekend get my eyes on the throttle body.

I havent had a check engine light on, just a code stored in the ECM.
I have this same thing. MB said it was a leaking mass air flow gasket, but both look good. They pulled the codes and it looks like there it is a software update for the gasoline engine control unit that could fix it. Were you able to get it fixed? Thanks!
Old 10-03-2023, 02:34 PM
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2011 E550 & 2014 ML350
Originally Posted by Dustin812
I have a 2011 E550, and have two codes being thrown P2185 "idle speed is to high when engine is warm", and p2189 idle speed control short to ground. I can't find any information on these. Any insight would be appreciated. Thanks!
Also checking with you as well. Thanks!

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