SPONSORED LINKS

EGR Fault Code 0401

Tiny
MPB
  • MEMBER
  • FORD EXPLORER
I have a 1996 Ford Explorer, 2WD, 5.0L engine with an automatic transmission. It has 192,000 miles. The check engine light is on and the fault code is 401. I have replaced the EGR valve, vacuum diaphragm, vacuum solenoid and the EGR position sensor. I measured vacuum at the outlet of the EGR solenoid at 15 inches. The voltage at the solenoid is 12 volts. I used a vacuum pump to manually operate the EGR valve and the motor speed dropped, indicating that the EGR valve is working properly. After doing all this, clearing the code and driving for 10 miles, the check engine light comes back on with the same fault code. What can I do to correct the problem?
SPONSORED LINKS
Monday, May 28th, 2007 AT 12:23 PM

2 Replies

Tiny
TAURUSWHEEL
  • MECHANIC
  • 718 POSTS
Possibly the egr ports in the intake are partially plugged? Any pinging froim the engine? Or any other codes?
Was this
answer
helpful?
Yes
No
Monday, May 28th, 2007 AT 1:40 PM
Tiny
MPB
  • MEMBER
  • 2 POSTS
I checked the ports to make sure they were clean and unobstructed. The motor runs smoothly and there is no pinging at all. I am at a loss as to what to try next.
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Monday, May 28th, 2007 AT 2:21 PM

Please login or register to post a reply.

Related EGR Valve Sensor Content

VIEW MORE

Sponsored links