Check engine light

Tiny
JOANIE0716
  • MEMBER
  • 2004 DODGE RAM
  • 5.7L
  • V8
  • 4WD
  • AUTOMATIC
  • 126,388 MILES
The check engine light keeps coming on. My son changed all four sensors and the EGR valve and a code comes up P0405. He also cleaned the carbon out we change the air filter and still comes on. I sometimes drive it for a day with out it coming on. And pop here it comes. Need to get my truck inspected please help.
Sunday, February 11th, 2018 AT 9:33 AM

5 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,700 POSTS
The code indicates an EGR issue. Here is a video on how to check it:

https://www.youtube.com/watch?v=DqUCbbKdWf4

I have also attached a picture of one to help you locate it. Note: The code is generic. However, I would recommend confirming it works properly. Also, make sure the wiring to the EGR is in good condition, not damaged, corroded. A poor connection can cause a false reading to the ECM.

One last thought, remove the EGR and make sure there is not a carbon build up.
Was this
answer
helpful?
Yes
No
Sunday, February 11th, 2018 AT 8:21 PM
Tiny
JOANIE0716
  • MEMBER
  • 2 POSTS
Hi guys, well my son checked everything. Repaired what needed to be repaired. Last night he took it for a ride and check engine light stay off. I get in it this morning to go to work and it is back on. Please help. Do not know what else to do.
Was this
answer
helpful?
Yes
No
Tuesday, February 13th, 2018 AT 10:19 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,512 POSTS
Did you replace the EGR valve?
Was this
answer
helpful?
Yes
No
Tuesday, February 13th, 2018 AT 10:21 AM
Tiny
JOANIE0716
  • MEMBER
  • 2 POSTS
How many miles do I have to drive after the check engine light is off? Before I get it inspected?
Was this
answer
helpful?
Yes
No
Tuesday, February 13th, 2018 AT 10:11 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,512 POSTS
Once the codes are cleared you will need to drive it long enough for the monitors to reset which is about 50 miles.
Was this
answer
helpful?
Yes
No
Wednesday, February 14th, 2018 AT 10:15 AM

Please login or register to post a reply.

Sponsored links