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passatt 1.9tdi?

my passatt has lost power it is not as responsive as it should be will only do about 70 flat out replaced all the engine sensors but still comes up with air flow meter which has been changed 3 times but it is still slow any ideas and its been on diagnostics
bill higgins, February 2011
how do i reset service light in volkswagen passat 07 1.9 tdi

joh, June 2011
Do you mean Mass Air Flow Sensor? Fit new genuine part, if pattern parts used they may be suspect. If you are sure the sensor is good you could have a wiring issue if diagnostics are pointing to MAF sensor. No/low airflow reading will limit power. Check live data.

mags, February 2011
check for splits in the air inlet hoses/pipes and intercooler also,try removing the inlet from the turbo and see if there is any play in the impeller,take it the filters have been done recently

cdc, February 2011