Not changing gears till revs high

[John Maddocks]

Hi I’ve got a problem with my w212 e220 I drove to work this morning everything fine but half way there approximately 10 miles I noticed gears were not changing up until revs were 2500 to 3000
And car really sluggish and paddle shift not working but no engine management light on I took battery lead off thinking need a reset but when reconnected engine management light came on so plugged code reader in and I got this error P0101 mass or volume air flow circuit range performance so changed air flow mass sensor but still the same any ideas thanks John


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[John Laidlaw]

When was the ATF and filter last changed?

 

[John Maddocks]

Hi I never changed gearbox oil or filter could this be the problem thanks for your response


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[John Laidlaw]

Could well be, what code reader did you use?

 

[star]

Lack of engine power would cause this, common and costly mistake changing the air mass for this fault code, not changed one yet. Look for a boost leak or get it on a star diagnostic.

 

[John Maddocks]

Lack of engine power would cause this, common and costly mistake changing the air mass for this fault code, not changed one yet. Look for a boost leak or get it on a star diagnostic.

Thanks you right not air mass had a more detailed look today it’s looks like it’s a atf leak from cooler which sits across front beam


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[John Maddocks]

Could well be, what code reader did you use?

Yes had a more detailed look coming from cooler which sits across front beam thanks again apparently common fault


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[chinnybang159]

Hi John,

Did fixing leak from cooler solve the problem?
Having a similar issue with my E350

Thanks