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dear all


Hope all well.


I was driving normally and I got 2B57 fault code. Dealership said its mass air flow sensor or secondary air pump (changed both) no cure. I am sure now dealership doesn't know what they are doing.


Can some please help me, I am in trouble with this code the cluster says engine fault reduced power.


Many thanks... :(
 

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2b57 means motor emergency program and is never found by itself. There has to be another code stores which causes that one.
 

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Your problem is with your DMTL (Diagnostic Monitoring-Tank Leakage) pump which draws a vacuum on the gas tank. It's a cheap component to replace. Left rear wheel well.
 
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