W211 pedal position sensor issue?
Thread Starter
Junior Member
Joined: Apr 2023
Posts: 24
Likes: 3
From: Connecticut
w211 e350 4matic
W211 pedal position sensor issue?
Hello,
Sometimes while in Park or Neutral my car will rev up to 2,000rpm and drop back down below 1,000.
It does it when both when I press on the pedal and even when i don’t.
I don’t think it’s an issue with the throttle body because I installed a new one recently, im thinking about going to a Mercedes dealer and getting it diagnosed there unless anyone on here knows what could be the issue.
Im guessing it could be the pedal position sensor itself.
thank you.
Sometimes while in Park or Neutral my car will rev up to 2,000rpm and drop back down below 1,000.
It does it when both when I press on the pedal and even when i don’t.
I don’t think it’s an issue with the throttle body because I installed a new one recently, im thinking about going to a Mercedes dealer and getting it diagnosed there unless anyone on here knows what could be the issue.
Im guessing it could be the pedal position sensor itself.
thank you.
Out Of Control!!
Joined: Apr 2019
Posts: 11,993
Likes: 6,827
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
wildly unstable idle...
Hello,
Sometimes while in Park or Neutral my car will rev up to 2,000rpm and drop back down below 1,000.
It does it when both when I press on the pedal and even when i don’t.
I don’t think it’s an issue with the throttle body because I installed a new one recently, im thinking about going to a Mercedes dealer and getting it diagnosed there unless anyone on here knows what could be the issue.
Im guessing it could be the pedal position sensor itself.
thank you.
Sometimes while in Park or Neutral my car will rev up to 2,000rpm and drop back down below 1,000.
It does it when both when I press on the pedal and even when i don’t.
I don’t think it’s an issue with the throttle body because I installed a new one recently, im thinking about going to a Mercedes dealer and getting it diagnosed there unless anyone on here knows what could be the issue.
Im guessing it could be the pedal position sensor itself.
thank you.
I think replacing TB contributes this additional issue. Original problem maybe: air bypass, MAF, ...
Recommend scanning the car for live faults before TB pushes ECU into limp-mode.
Throttle command has safety considerations.
Thread Starter
Junior Member
Joined: Apr 2023
Posts: 24
Likes: 3
From: Connecticut
w211 e350 4matic
The engine computer needs to be trained to use your new throttle body. This is done using MB Xentry....
I think replacing TB contributes this additional issue. Original problem maybe: air bypass, MAF, ...
Recommend scanning the car for live faults before TB pushes ECU into limp-mode.
Throttle command has safety considerations.
I think replacing TB contributes this additional issue. Original problem maybe: air bypass, MAF, ...
Recommend scanning the car for live faults before TB pushes ECU into limp-mode.
Throttle command has safety considerations.
where do you recommend purchasing this MB Xentry?
Out Of Control!!
Joined: Apr 2019
Posts: 11,993
Likes: 6,827
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
The answer would be @BenzNinja with acclaimed remote service... so I hear
Last edited by CaliBenzDriver; May 3, 2023 at 02:19 AM.
Member
Joined: Jan 2007
Posts: 203
Likes: 0
From: OC
02 E320 Blk, 09 E350 Blk
Try this!
Hello,
Sometimes while in Park or Neutral my car will rev up to 2,000rpm and drop back down below 1,000.
It does it when both when I press on the pedal and even when i don’t.
I don’t think it’s an issue with the throttle body because I installed a new one recently, im thinking about going to a Mercedes dealer and getting it diagnosed there unless anyone on here knows what could be the issue.
Im guessing it could be the pedal position sensor itself.
thank you.
Sometimes while in Park or Neutral my car will rev up to 2,000rpm and drop back down below 1,000.
It does it when both when I press on the pedal and even when i don’t.
I don’t think it’s an issue with the throttle body because I installed a new one recently, im thinking about going to a Mercedes dealer and getting it diagnosed there unless anyone on here knows what could be the issue.
Im guessing it could be the pedal position sensor itself.
thank you.
Recently removed TB out from w210 and w211 to clean out all the gunks around the TB plate turning it manually by hand.( goes only one way). All cleaned nice and installed back, turned the engine the rpm jumped up n down too much.
Shut off the engine. Turn the key to #2 position(do not start)
Open the hood, put your ear close to TB, wait about 30 sec then you’ll hear click click sound from the TB plate. Ecu resets the TB, now start the car and rpm will be smooth as silk
Just try it, you’ll feel better
Thread Starter
Junior Member
Joined: Apr 2023
Posts: 24
Likes: 3
From: Connecticut
w211 e350 4matic
Does nothing…
Recently removed TB out from w210 and w211 to clean out all the gunks around the TB plate turning it manually by hand.( goes only one way). All cleaned nice and installed back, turned the engine the rpm jumped up n down too much.
Shut off the engine. Turn the key to #2 position(do not start)
Open the hood, put your ear close to TB, wait about 30 sec then you’ll hear click click sound from the TB plate. Ecu resets the TB, now start the car and rpm will be smooth as silk
Just try it, you’ll feel better
Shut off the engine. Turn the key to #2 position(do not start)
Open the hood, put your ear close to TB, wait about 30 sec then you’ll hear click click sound from the TB plate. Ecu resets the TB, now start the car and rpm will be smooth as silk
Just try it, you’ll feel better
I’ve tried this multiple times at it has done nothing to fix my issue.
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w211 e350 4matic
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Super Member
Joined: Jun 2018
Posts: 533
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From: Northern Hemisphere - Chicago
fleet
have you had the car smoked to check for vacuum leaks also, it could explain the idle issue
these are all basic things that any mechanic can help you with like pulling axle or attaching a smoke machine with a vacuum
these are all basic things that any mechanic can help you with like pulling axle or attaching a smoke machine with a vacuum
Thread Starter
Junior Member
Joined: Apr 2023
Posts: 24
Likes: 3
From: Connecticut
w211 e350 4matic
