Solenoid Problem

[quote:a7221ac015="RecurveTD2"]I have a 98 626, with 115K miles on it. My check engine light recently came on (again) after having just got it back from the shop to replace a bad O2 sensor and a faulty radiator fan. According to a diaognoistic check, the code P0400 came up. It looks like a fautly solenoid might be the problem, a very costly repair job for me, considering I just shelled out a few hundred to fix a overheating problem.

My question is this. My mechanic says I can put off fixing the solenoid until I get some money saved up. What does a solenoid do exactly? Will waiting 4 to six months to replace it do major damage to my car? My check engine light is on.

Jeremy[/quote:a7221ac015]

What does this solenoid controls?

What does this solenoid controls?[/quote]


Emissions.

[quote:c0098090b2="RecurveTD2"]What does this solenoid controls?[/quote:c0098090b2]


Emissions.[/quote] For what the Evap, EGR, etc. for a 2.0 it has 7 and 10 for 2.5L

[quote:df52540e02="rasmataz"][quote:df52540e02="RecurveTD2"]What does this solenoid controls?[/quote:df52540e02]


Emissions.[/quote:df52540e02] For what the Evap, EGR, etc. for a 2.0 it has 7 and 10 for 2.5L[/quote]


It is for the EGR system.

[quote:1fdef5ba5c="RecurveTD2"][quote:1fdef5ba5c="rasmataz"][quote:1fdef5ba5c="RecurveTD2"]What does this solenoid controls?[/quote:1fdef5ba5c]


Emissions.[/quote:1fdef5ba5c] For what the Evap, EGR, etc. for a 2.0 it has 7 and 10 for 2.5L[/quote:1fdef5ba5c]


It is for the EGR system.[/quote] it provides vacuum to EGR -no vacuum equals pinging/spark knock and EGR stuck open equals to erratic idle/plus hesitation and all kinds of wierd stuffs that's unbelievable