P0401engine code woes
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Abdul
- B2
- Posts: 173
- Joined: Mon Mar 06, 2017 7:34 pm
- Passat model: B5.5 1.9tdi 4mot
- Location: Thornaby
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P0401engine code woes
I purchased a Passat 1.9tdi 4motion on a 04 plate in Mar 2017. Since purchase the engine management light has always been on though no power issues and never gone into limp mode. The code returns as p0401 which I thought would be the EGR valve which I replaced 2 days ago and deleted the fault code from ecu. Low and behold it has returned. Any pointers to possible cause or rectification would be greatly appreciated.