P0120 code
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MBWorld Fanatic!
Joined: Jul 2014
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2005 e55 AMG
P0120 code
Just did some exhaust work after car sat for a month and took a test drive.
Power was all over the place with hard flat spots in acceleration and wide band readings erratic. Got it home and White ESP malfunction light came on, no throttle control, car dead to throttle inputs in my driveway and a P0120 "Deflection of throttle valve" code comes up. ???
Cycle key, goes away then will come back. Also NO check engine light unless Im not waiting long enough.
Throttle body crapped out ? Never heard of a "deflection" code.
Also a bank 1 throttle control code was pending, forgot what the code was but is gone now.
Will try another throttle body and see but thought I would ask, Thanks
Power was all over the place with hard flat spots in acceleration and wide band readings erratic. Got it home and White ESP malfunction light came on, no throttle control, car dead to throttle inputs in my driveway and a P0120 "Deflection of throttle valve" code comes up. ???
Cycle key, goes away then will come back. Also NO check engine light unless Im not waiting long enough.
Throttle body crapped out ? Never heard of a "deflection" code.
Also a bank 1 throttle control code was pending, forgot what the code was but is gone now.
Will try another throttle body and see but thought I would ask, Thanks
Last edited by SICAMG; Jan 19, 2023 at 02:04 PM.
Thread Starter
MBWorld Fanatic!
Joined: Jul 2014
Posts: 3,331
Likes: 586
2005 e55 AMG
Will test with my old 80mm and see today.
It's funny how there can be multiple code definitions for any given code. This 120 code has at least 3 variants that the PCM will spit out depending on what it see's.
It's funny how there can be multiple code definitions for any given code. This 120 code has at least 3 variants that the PCM will spit out depending on what it see's.
Thread Starter
MBWorld Fanatic!
Joined: Jul 2014
Posts: 3,331
Likes: 586
2005 e55 AMG
OK drove the hell out of it with my 80mm throttle body. Ran great until a couple key cycles and now just these codes. No more ESP light so think there is two issues going on aside from the throttle body crapping out so my 82mm is bad.
P202B-002 idle speed implausible short to ground/open --- P20A2 unmetered air so will start poking around since the blower was off a month ago see if something pinched on lower intake or the 80mm I put on in frustration is not sealing right. This also happened after a heavy 1-2 burn out and then had a high, 1,000 rpm idle for a bit.
So the P0202B-002 is my culprit right now and does throw the mil light.
P202B-002 idle speed implausible short to ground/open --- P20A2 unmetered air so will start poking around since the blower was off a month ago see if something pinched on lower intake or the 80mm I put on in frustration is not sealing right. This also happened after a heavy 1-2 burn out and then had a high, 1,000 rpm idle for a bit.
So the P0202B-002 is my culprit right now and does throw the mil light.
Last edited by SICAMG; Jan 22, 2023 at 10:39 AM.
