如果盖子类同这个,中间里面有弹簧(不清楚2000的车有没有)。换盖子是最方便的一试,无果的话,换EGR parts...
The code P0401 is listed among other possible codes. The repair again involves cleaning the EGR ports. Toyota Camry/Corolla: In Toyota Camry with the 2.2L engine, the code P0401 was often caused by a bad VSV (Vacuum Switching Valve) for the EGR, located under the intake at the back of the engine.

