Code P374A - MBWorld.org Forums

Jul 9, 2020 | 07:10 PM

tdk930s

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Junior Member

Joined: May 2014

Posts: 60

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From: SF Bay Area

2011 C63 P31 LSD

Code P374A

Hi everyone
I wonder anyone one has this code before ? What happened to me is right after i have a shop guy changed my transmission fluid, i felt the car will jerk a little when i switch from difference mode while the car stand still. and i though that is normal for the new fluid. Today i use a OBD2 scanner to scan the car ,it has a P374A code comes out and it can"t be remove. i wonder could it be the fluid over or under filled to cause that code comes out ?
Please advice..
Thanks

Jul 9, 2020 | 07:40 PM

BLKROKT

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Joined: Jun 2008

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From: Los Angeles

2012 P31 C63 Coupe Trackrat, 2019 GLE63S Coupe Beast

I’ve had it appear a bunch of times.

https://mbworld.org/forums/c63-amg-w...nsmission.html

https://mbworld.org/forums/c63-amg-w...-problems.html

I still have it today, apparently it’s permanent at this point. Never got a conclusive answer but car’s been running great for years so I’m not worried about it.

Jul 9, 2020 | 07:52 PM

tdk930s

Thread Starter

Junior Member

Joined: May 2014

Posts: 60

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From: SF Bay Area

2011 C63 P31 LSD

So you think the little jerk is fine when i switched through the modes (from M to C ) ?
cause this is the first time i have changed the transmission fluid (65000 miles)

Jul 9, 2020 | 08:05 PM

BLKROKT

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Joined: Jun 2008

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From: Los Angeles

2012 P31 C63 Coupe Trackrat, 2019 GLE63S Coupe Beast

I never got a jerk from changing the transmission selector. Of course it’s also been exclusively in Manual for the past 4 years so maybe I wouldn’t know. Not going to try either.

Jul 9, 2020 | 08:24 PM

RandyMarsh

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Joined: Nov 2019

Posts: 46

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From: Portland, OR

2012 C63 AMG Coupe

Quote:

Originally Posted by BLKROKT

I never got a jerk from changing the transmission selector. Of course it’s also been exclusively in Manual for the past 4 years so maybe I wouldn’t know. Not going to try either.

can you permanently keep it in manual? or do you mean you just instantly pop it into S->S+>M as soon as you fire it up? Id love to know if there was a way to be in permanent M mode

As to the OP - occasionally when i pop it into S>S+>M i notice the car makes a tiny movement, and a little noise, has to be very quiet to notice. I definitely wouldnt call it a jerk and I assumed it was normal when switching between modes.

Sep 17, 2025 | 03:19 PM

Rocco Russo

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Joined: Dec 2012

Posts: 42

Likes: 2

Quote:

Originally Posted by BLKROKT

Hey, sorry to revive an old thread, but did you ever get this sorted? I have this code and P0736 which on my Autel shows as a cam sensor issue, but on my cheap generic scanner and everywhere I search it’s an incorrect reverse gear ratio.

Getting a faint steady whining noise when my trans fluid warms up, which increases & decreases in conjunction with engine’s rpm.

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