I changed the engine oil

Macieanne

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W140 1994 S320 + C215 2001 CL500
Hi I changed the engine oil and a day later my throttle pedal became unresponsive and after a short time it stopped working altogether, I got the engine warning lite and a p0120 code, I have changed
the throttle pedal and the mass air flow sensor no fix, The engine starts and runs very well at idle but no response from the Throttle, can anyone HELP, Regards FRED.
Sorry this is a new to me car 2001 CL500 C215
 
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LostKiwi

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'93 500SL-32, '01 W210 Estate E240 (RIP), 02 R230 SL500, 04 Smart Roadster Coupe, 11 R350CDi
Probably a failed throttle position sensor (on the throttle body) but really it needs properly diagnosing with Star or similar.
 

mercmancdi

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2009 E250 cdi 08 cls320 cdi ,2007 e280 cdi '2005 E 280 CDI ,VW TOUAREG ,JAGUAR S AND xTO NAME A FEW
As Lostkiwi ,
Found this if it helps.
FAULT P0120 MERCEDES-BENZ - Throttle/Petal Position Sensor/Switch A Circuit Malfunction
Possible causes




    • Faulty Throttle Position Sensor



    • Throttle Position Sensor circuit is open or shorted

First diagnose P0120 MERCEDES-BENZ code




    • Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded terminals.
 
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Macieanne

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  • Thread Starter
  • Thread starter
  • #4
Hi everyone Thank you so much for the fast response, I don't think you will believe what the fix was, an old friend of mine
suggested I clean the Throttle Body it was very dirty 145.000 miles, it is now gleaming and that was the fix, my car it is now running perfect. Regards Fred
PS when I first got the car it had no Air fitters in it, drrrrrrr.
I hope this is of use to others and thanks again
 
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