I keep getting the po400 code, I have checked the vacuum hoses,cleaned & checked the egr valve and checked the egr valve solenoid. From the reading that I have done I have learned that if you don't have enough exhaust backpressure it can through this code.The car has the cats removed but I did that two years with no problem untill recently. Any ideas ?

 

do you have 02sims? maby one has gone bad

 

I do have O2 sims, I will check them and let you know thanks.

 

PluggeD EGR ports????

 

Whatdo the O2 sims have to do with anything?

 

i dunno, just wonderin if one possibly went bad and is throwing a code.

 

He already knows what the code is.

Some good reading... http://bbs.zuwharrie.com/content?topic=27769.0

http://www.obd-codes.com/p0400