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Q: code # po401 & po102. on 2002 Volkswagen Jetta TDI

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
How do I fix ? Rest codes but came back. po401
No car image 94a1663db56199c5353592009e34aaa51078a2469bed068bb8d6f0ba43accf97
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I bet the car has low performance as well.
The EGR port seems to be clogged, also there might be excessive carbon deposit build up in the intake manifold runners.
The EGR system and intake manifold needs to be checked and cleaned throughly.
The P0102 can be a bad MAF sensor - very common on VWs, but also could be because of the restricted manifold.
If you lucky you might be able to find a mechanic or a machine shop nearby with an ultrasonic cleaner and they can clean the manifold, otherwise you might need to get a new one.
Anyway, first step is the EGR system, second is the manifold, than recheck MAF for P0102.
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