Exhaust flap issue w/ power loss
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Member
Joined: May 2016
Posts: 210
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C63s
Exhaust flap issue w/ power loss
Hello, I’ve been searching for hours and haven’t really got anywhere.
I have a 2017 c63s that’s got DP and DME tune.
I was originally dealing with a problem on the exhaust flaps not operating correctly, when pressing the PE button inside to open the valves it would close instead and vise versa. This would make the ECU close the flaps top end causing it to cut boost due to three restricted air flow.
The actuators were after market since it came with the AWE catback (purchased the car as is)
I decided to purchase 3 OEM AMG valve actuators off eBay that were on a 2020 for 3k miles.
After installing the rear 2 and turning the car on, I get nothing at all now.
PE button turns red but the flaps won’t engage open or close, just stays open.
I plugged in scanner and received two codes,
1) Exhaust flap 2 has an electrical fault or an open circuit.
2) The exhaust flap has an electrical fault or an open circuit.
Now I’m dealing with severe power cut top end past 5k rpms where it’ll drop to 350hp on gauge.
my plan is to try and put back the old actuators to see if it’ll work again,
but is there anyone that have some tips or can point me to the right directions?
Thanks in advance!
I have a 2017 c63s that’s got DP and DME tune.
I was originally dealing with a problem on the exhaust flaps not operating correctly, when pressing the PE button inside to open the valves it would close instead and vise versa. This would make the ECU close the flaps top end causing it to cut boost due to three restricted air flow.
The actuators were after market since it came with the AWE catback (purchased the car as is)
I decided to purchase 3 OEM AMG valve actuators off eBay that were on a 2020 for 3k miles.
After installing the rear 2 and turning the car on, I get nothing at all now.
PE button turns red but the flaps won’t engage open or close, just stays open.
I plugged in scanner and received two codes,
1) Exhaust flap 2 has an electrical fault or an open circuit.
2) The exhaust flap has an electrical fault or an open circuit.
Now I’m dealing with severe power cut top end past 5k rpms where it’ll drop to 350hp on gauge.
my plan is to try and put back the old actuators to see if it’ll work again,
but is there anyone that have some tips or can point me to the right directions?
Thanks in advance!
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C63samg w205 edition 1
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help
Hello, I’ve been searching for hours and haven’t really got anywhere.
I have a 2017 c63s that’s got DP and DME tune.
I was originally dealing with a problem on the exhaust flaps not operating correctly, when pressing the PE button inside to open the valves it would close instead and vise versa. This would make the ECU close the flaps top end causing it to cut boost due to three restricted air flow.
The actuators were after market since it came with the AWE catback (purchased the car as is)
I decided to purchase 3 OEM AMG valve actuators off eBay that were on a 2020 for 3k miles.
After installing the rear 2 and turning the car on, I get nothing at all now.
PE button turns red but the flaps won’t engage open or close, just stays open.
I plugged in scanner and received two codes,
1) Exhaust flap 2 has an electrical fault or an open circuit.
2) The exhaust flap has an electrical fault or an open circuit.
Now I’m dealing with severe power cut top end past 5k rpms where it’ll drop to 350hp on gauge.
my plan is to try and put back the old actuators to see if it’ll work again,
but is there anyone that have some tips or can point me to the right directions?
Thanks in advance!
I have a 2017 c63s that’s got DP and DME tune.
I was originally dealing with a problem on the exhaust flaps not operating correctly, when pressing the PE button inside to open the valves it would close instead and vise versa. This would make the ECU close the flaps top end causing it to cut boost due to three restricted air flow.
The actuators were after market since it came with the AWE catback (purchased the car as is)
I decided to purchase 3 OEM AMG valve actuators off eBay that were on a 2020 for 3k miles.
After installing the rear 2 and turning the car on, I get nothing at all now.
PE button turns red but the flaps won’t engage open or close, just stays open.
I plugged in scanner and received two codes,
1) Exhaust flap 2 has an electrical fault or an open circuit.
2) The exhaust flap has an electrical fault or an open circuit.
Now I’m dealing with severe power cut top end past 5k rpms where it’ll drop to 350hp on gauge.
my plan is to try and put back the old actuators to see if it’ll work again,
but is there anyone that have some tips or can point me to the right directions?
Thanks in advance!
How did u solve it
Junior Member
Joined: Dec 2020
Posts: 21
Likes: 1
C63samg w205 edition 1
its something to do with when they remap the car or if you’ve ever had a software update
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best bet is to take it to Mercedes I absolutely tried everything with these in the end it went back to Mercedes and after about 2 weeks they managed to figure it out putting new valves in software updating it and having to play around with the coding!
its something to do with when they remap the car or if you’ve ever had a software update
its something to do with when they remap the car or if you’ve ever had a software update
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Joined: Oct 2024
Posts: 8
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From: Los Angeles
2020 C63 Coupe
best bet is to take it to Mercedes I absolutely tried everything with these in the end it went back to Mercedes and after about 2 weeks they managed to figure it out putting new valves in software updating it and having to play around with the coding!
its something to do with when they remap the car or if you’ve ever had a software update
its something to do with when they remap the car or if you’ve ever had a software update
Junior Member
Joined: Dec 2020
Posts: 21
Likes: 1
C63samg w205 edition 1
will see if I can get hold of the work order but it was bath Mercedes who ended up sorting mine out was something to do with fitting new valves then playing around with the coding of the valves which ended up fixing it
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W205 C63 Sedan
I had a similar issue when I purchased my car used. I took it to the dealer, and the technician found that the wiring was damaged (from rubbing against the body). I got a similar code and experienced soft limp mode (with no check engine light).
My symptoms were that once the flaps opened during full throttle, they would stay open. It was obnoxiously loud in the garage.
My symptoms were that once the flaps opened during full throttle, they would stay open. It was obnoxiously loud in the garage.
