Help!!! W203 Intermittent Hesitation
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Joined: Jun 2008
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2006 W203 C200k
Help!!! W203 Intermittent Hesitation
My 2006 W203 with m271 engine is acting weird lately, the car is hesitating when accelerating from a stop. I took the car to two mechanics to check for fault codes and every time its gives the same fault (air pressure is to too low). They checked for vacuum leaks and didn't find any. Below are the things that I've changed:
Spark plugs, intake air flap actuator, air flow sensor, camshaft sensors, air filter, fuel filter, cleaned the throttle body, cleaned the catalytic converter, found some oil in the ecu plugs and cleaned it.
When I start the car in the morning it makes a loud whining noise for 10 seconds, it runs perfectly until i turn it off and then start the car again then it starts to hesitate. It runs perfectly every time I go the mechanic then one day later it starts to hesitate.
What could be the problem? The car has done 47k miles only!!
Someone told me the supercharger may be failing but im suspecting the coils!
Please help
Spark plugs, intake air flap actuator, air flow sensor, camshaft sensors, air filter, fuel filter, cleaned the throttle body, cleaned the catalytic converter, found some oil in the ecu plugs and cleaned it.
When I start the car in the morning it makes a loud whining noise for 10 seconds, it runs perfectly until i turn it off and then start the car again then it starts to hesitate. It runs perfectly every time I go the mechanic then one day later it starts to hesitate.
What could be the problem? The car has done 47k miles only!!
Someone told me the supercharger may be failing but im suspecting the coils!
Please help
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Joined: Mar 2004
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From: Boston, MA
'14 ML350, '13 C220 CDI, '07 C280, '98 ML320
My 2006 W203 with m271 engine is acting weird lately, the car is hesitating when accelerating from a stop. I took the car to two mechanics to check for fault codes and every time its gives the same fault (air pressure is to too low). They checked for vacuum leaks and didn't find any. Below are the things that I've changed:
Spark plugs, intake air flap actuator, air flow sensor, camshaft sensors, air filter, fuel filter, cleaned the throttle body, cleaned the catalytic converter, found some oil in the ecu plugs and cleaned it.
When I start the car in the morning it makes a loud whining noise for 10 seconds, it runs perfectly until i turn it off and then start the car again then it starts to hesitate. It runs perfectly every time I go the mechanic then one day later it starts to hesitate.
What could be the problem? The car has done 47k miles only!!
Someone told me the supercharger may be failing but im suspecting the coils!
Please help
Spark plugs, intake air flap actuator, air flow sensor, camshaft sensors, air filter, fuel filter, cleaned the throttle body, cleaned the catalytic converter, found some oil in the ecu plugs and cleaned it.
When I start the car in the morning it makes a loud whining noise for 10 seconds, it runs perfectly until i turn it off and then start the car again then it starts to hesitate. It runs perfectly every time I go the mechanic then one day later it starts to hesitate.
What could be the problem? The car has done 47k miles only!!
Someone told me the supercharger may be failing but im suspecting the coils!
Please help
I'd focus the investigation on the secondary air pump and related hoses/valves. Either the pump is failing and not pumping enough air or there is some obstruction in the secondary air system. The diagnostic code you've listed is related to secondary air system.
Thread Starter
Newbie
Joined: Jun 2008
Posts: 3
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2006 W203 C200k
thanks for your reply, can you please tell me where is the pump located and as for code p0120 could it be a bad tps?? does it fail at this low mileage??
Last edited by yazanh82; Mar 27, 2015 at 05:48 PM.
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