codes will not go away

[sliversho]

I have code 332 for egr flow. have replaced egr valve and cleaned egr tube. plus code 551 for iac. the car runs fine and drives fine still getting 24 to 28 mpg. have replaced iac too. need help to fix this. plus cel is on too i dont know if these two codes do anything with it

 

[Off Road SHO]

Don't know what type of SHO you have but my 91 had that code for the EGR and after doing what you did, it turned out to be a vacuum hose was disconnected at the DFPE sensor. ARRRRGGGGHHHH!!!! Check for the simple things first.

Don't know anything about the Idle air control though.

Tom

 

[sliversho]

checked all vacuum line and all ok. checked egr valve with vacuum pump and ok. is there any other egr passages that i have missed in the intake without removing intake? the car is a 93 atx

 

[F-22 Raptor SHO]

THe DFPE sensor is that square block bolted to the back of the rear plenum. Clean it out or replace it. The vac lines go from there to the EGR.

Oh yea, then clear the codes once you are done.

 

[SASHO91]

Are you still getting a CEL?

Or

are you just reading the codes? If so, you could be reading the codes that are stored. Clear the codes as Michael said.

 

[sliversho]

i have access for a code reader and both codes are hard codes. pfe is working like it sapost to have cleaned it too

 

[Off Road SHO]

Hard codes? Do you mean that you erased them and they came back?

Tom

 

[nik97]

A common failure for the DPFE is moisture contamination from the exuast tubes leading to it and causing erroneous readings and EGR codes even though it runs fine. Find out if they are both hard fault codes and not continuous memory DTCs.

 

[sliversho]

found thread on cleaning the nostils and did that and cleaned map sensor and pfe and cleared codes. went and drove cel does not come on [knock on wood] we will see what will happen