Turbo issues
Thread Starter
Junior Member
Joined: Aug 2005
Posts: 18
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From: Canada
2016 C300 Sport 4matic
Turbo issues
Hello everyone,
My 2016 w205 seems to have a turbo issue as under harder acceleration it loses some power and I have to let off the gas and then accelerate slower to get it to go properly. I find it happens mostly under hard acceleration merging onto the highway or while passing others. It has never gone into limp mode but maybe because I keep letting off the gas when it happens.
I put the scanner on it and I get the P029921 code "The boost pressure of the turbocharger 1 is too low. The signal amplitude is less than the minimum amplitude".
I have read lots about turbo hose leaks, diverter valves going bad, wastegate actuator stuck, etc as being the most likely culprits, but given that I can still drive the car normally and only under hard acceleration I'm experiencing the turbo loss, is there somewhere/or some item that I should be starting with (more likely to be the issue) when I'm starting to attempt to repair this issue?
Thanks in advance for any help.
My 2016 w205 seems to have a turbo issue as under harder acceleration it loses some power and I have to let off the gas and then accelerate slower to get it to go properly. I find it happens mostly under hard acceleration merging onto the highway or while passing others. It has never gone into limp mode but maybe because I keep letting off the gas when it happens.
I put the scanner on it and I get the P029921 code "The boost pressure of the turbocharger 1 is too low. The signal amplitude is less than the minimum amplitude".
I have read lots about turbo hose leaks, diverter valves going bad, wastegate actuator stuck, etc as being the most likely culprits, but given that I can still drive the car normally and only under hard acceleration I'm experiencing the turbo loss, is there somewhere/or some item that I should be starting with (more likely to be the issue) when I'm starting to attempt to repair this issue?
Thanks in advance for any help.
