...together to deliver the correct amount of recirculation based on engine temperature, load, etc. The P0401 code means that OBD detected an insufficient amount of EGR. Symptoms You may notice ...
...egr valve after i replaced those parts i got the engine light. any ideas http://www.obd-codes.com/p0401 Check here for
...1999 buick century code 401pd If the DTC is P0401 it means that the EGR Valve is clogged or air flow is insufficient.Take EGR valve off and clean carbon out or replace EGR valve with a new ...
...1999 For OBD code problems check the list of help links below. Click the link below to go through its procedure. ...
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