Wastegate? - MBWorld.org Forums

Oct 31, 2022 | 07:37 AM

Marktee

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From: DFW USA

2012 C250 Turbo M271 EVO, 08 X3, 08 328i

Wastegate?

Does the 2012 C250 Turbo 1.8L have a wastegate in its turbo???
What happens to the high pressured air in the pipes when the throttle body closes when removing foot off gas pedal at 70 miles per hour???
The car is moaning with a slight vibration during the closing and will return to normal acceleration after pressing on the gas pedal!!

Nov 1, 2022 | 02:38 AM

Odd Piggy

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2021 GLB250 FWD, 2023 GLA250 FWD, 2013 C250, 2015 GLK350, 2005 ML350SE, 2003 E320

Yes. It’s called Bypass Control Valve. It can fail, but it’s not all that common.

Nov 1, 2022 | 11:08 PM

Marktee

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From: DFW USA

2012 C250 Turbo M271 EVO, 08 X3, 08 328i

Quote:

Originally Posted by Odd Piggy

Yes. It’s called Bypass Control Valve. It can fail, but it’s not all that common.

I watched a video showing how to test the bypass valve but I couldn’t reach to the back of it remove the small hose however was able to trace the hose up to the solenoid. While trying to remove the hose I broke the solenoid and of course the dealer charged me an arm and a leg, 70 dollars. I did not stick with the plan which says, If it ain’t broke don’t fix it..anyways , I pushed some air through the hose and the arm of the bypass valve retracted ..I also removed the diverter blowoff valve to place in a spring that was not installed at the first time when I replaced it. The car now started to vibrate upon acceleration. Code is p023400 overboost. Would the the map sensor and the pressure sensor cause this

Last edited by Marktee; Nov 2, 2022 at 11:40 PM. Reason: Adding

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