P0403 Error and testing the EGR solenoid valve

Reply Subscribe

Thread Tools

Search this Thread

08-30-2015, 03:19 PM

52caddy

Junior User

Thread Starter

Join Date: Sep 2007

Location: Beer Town, USA

Posts: 72

Likes: 0

Received 0 Likes on 0 Posts

P0403 Error and testing the EGR solenoid valve

Hi Guys,
I'm assuming that I should not be able to blow thru the the EGR vacuum solenoid valve when it's not energized, is that correct?

I pulled the solenoid valve after getting the error, and it doesn't seem to be closing off when it's out of the vehicle. From what I've read it sounded like the valve should be closed.
Thanks

Reply Like

08-30-2015, 03:35 PM

projectSHO89

Hotshot

Join Date: Jan 2004

Location: St Louis

Posts: 19,342

Likes: 0

Received 872 Likes on 724 Posts

Quote:

I'm assuming that I should not be able to blow thru the the EGR vacuum solenoid valve when it's not energized, is that correct?

No, it isn't. It is normal for BOTH ports on an EVR solenoid to vent to atmosphere when the valve isn't energized.

What are you working on? P0403 can mean different things depending on the specific EGR system deployed. Besides, that fault code is for an electrical circuit fault. Check the coil resistance, probably around 25-40 ohms. Make sure it's plugged in, etc.

Reply Like

08-31-2015, 06:17 PM

scott91370

Fleet Mechanic

Join Date: Dec 2008

Location: Burleson, Tx

Posts: 1,796

Likes: 68

Received 94 Likes on 76 Posts

This happened to mine a while back-

Quote:

The ground wire going into the solenoid was bad. I gave it a little tug since it never did ground out to activate the solenoid and it came right out. I was able to remove the pin from the plug and repair it.

https://www.ford-trucks.com/forums/1...l-circuit.html

Reply Like