Check engine light with no codes

Reply Subscribe

Thread Tools

Search this Thread

Feb 17, 2015 | 09:38 PM

Farmerrye

Thread Starter

Junior User

Joined: Oct 2013

Posts: 50

Likes: 0

Check engine light with no codes

Hey guys I have a late 2004 with 130k with a bpd egr cooler and new oil cooler and new ficm from Ed. Cat delete with no muffler. Everything else is stock I have a dash boss and was noticing some weird numbers. My check engine light came on but I couldn't get any codes with the dashboss. I started monitoring the egr error and saw some erratic readings really high negative numbers after I let the throttle off. The truck runs okay but was kinda starting slow. Could my egr valve be stuck? Could my short modified exhaust be messing things up??

Thanks in advance

Feb 17, 2015 | 11:18 PM

Bullitt390

Certified Thread Hijacker

Joined: Aug 2001

Posts: 14,441

Likes: 60

Dashboss should be pulling the codes if you have a CEL.

Josh

Feb 18, 2015 | 07:45 AM

69cj

Hotshot

Joined: Jul 2005

Posts: 13,834

Likes: 26

From: Middle Tn.

The last time I had a cel and no codes it was a sticking turbo.

Feb 18, 2015 | 10:04 AM

Farmerrye

Thread Starter

Junior User

Joined: Oct 2013

Posts: 50

Likes: 0

No Dtc but the light is still on ...... I can see with the dashboss that it's building boost and hear it spool. What about the egr readings that I am getting ?? Any suggestions

Feb 18, 2015 | 09:17 PM

Farmerrye

Thread Starter

Junior User

Joined: Oct 2013

Posts: 50

Likes: 0

Quote:

Originally Posted by Farmerrye

No Dtc but the light is still on ...... I can see with the dashboss that it's building boost and hear it spool. What about the egr readings that I am getting ?? Any suggestions

Still getting egr error readings greater than -50%.

Feb 19, 2015 | 12:14 PM

BoKnowsDiesel

Former Vendor

Joined: May 2014

Posts: 243

Likes: 0

From: Central Ohio

Seems odd that the MIL is on without seeing any codes... I am not too familiar with the Dashboss, but you may want to hook up another, independant scanner and try to pull any live or stored codes.

Feb 19, 2015 | 01:05 PM

Bullitt390

Certified Thread Hijacker

Joined: Aug 2001

Posts: 14,441

Likes: 60

Is anything showing up under Configuration/Vin ? Should at least have the first 3 digits of the vin show up.

May do a reset.

Disconnect the gateway.
Do level 1 reset
Clear app from background.
Connect Gateway
Start engine
Synch Bluetooth
Restart app and let it rescan the VIN
Pull codes

Josh