Help! CEL on and no idea why!

[ornithology]

Okay. So here's the issue, I changed the air filter on my 03 sport. I took off the KKM and put the stock airbox back in. After several km's I get a CEL. Ok, I change it back to the KKM expecting it to be fine after, it was until I revved really hard to test it. Once I revved it over 6.5k rpm, the CEL came on. Now I'm wondering what may be the cause of this? Should I clean my MAF? I'll try to get the code, but the friggin' dealership here in Canada charges $90 to read it!! Wish I had an autozone up here.

 

[BrooklynBay]

It's cheaper to get your own code reader than to pay everytime you need to read a code.

 

[410Fortune]

Actron pocket scan is $35

 

[parad1mg]

try disconnecting the battery for a few minutes.. you have any kind of auto parts store like advanced auto up there that can read and clear codes for you?

 

[BrooklynBay]

Harbor Freight & Amazon have some cheap scanners. Sears sells scanners in their retail stores.

 

[ornithology]

K I'll get back to you guys once I pull the code.

 

[RockyMtnHigh]

I bought an OBD II reader at Princess Auto here for $39.99 CDN. They have a store in Coquitlam if your in their neighbourhood.

www.princessauto.com

 

[ornithology]

Well I just got an OBD II reader and the code I'm getting is P0405. Something to do with the exhaust? I searched and I ended up with answers regarding the DPFE sensor? Anyone help me on where this is located and what to do? Thanks.

 

[RockyMtnHigh]

Well I just got an OBD II reader and the code I'm getting is P0405. Something to do with the exhaust? I searched and I ended up with answers regarding the DPFE sensor? Anyone help me on where this is located and what to do? Thanks.

P0405 = EGR Flow Sensor A Circuit Low Input

SOHC or OHV?

 

[ornithology]

SOHC

How do I fix it?

 

[RockyMtnHigh]

The DPFE on my SOHC is located on the driver's side below the cam cover. It is a thin body piece with two hoses at the bottom. If the DPFE or the hoses are clogged you will have problems. I was refered to this site and it solved my problem:

http://www.aa1car.com/library/ford_lean_codes.htm

There is a picture of it there.