EGR Problem or computer problem? code p0403 - Dodge Cummins Diesel Forum
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Old 09-16-2009, 05:30 PM   #1 (permalink)
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Angry EGR Problem or computer problem? code p0403

Have a hard code of p0403 cant get rid of it. Edge wont clear it, dealer cant clear it, cleaned egr valve and still there. EGR plugged in. Have not run truck without it plugged in. Do have H&S dpf delete. Dealer says might be computer problem!! only have 80000miles on 6.7. Please Help!!
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Old 09-16-2009, 05:39 PM   #2 (permalink)
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I looked on OBD-II Trouble Code: P0403 Exhaust Gas Recirculation Circuit Malfunction

there are a few things to look at there...
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Old 09-16-2009, 05:44 PM   #3 (permalink)
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That code is from no Control circuit. Meaning it is not sensing the motor itself.
Pins 6,7,8 are for the motor unit. If you can meter them and see resistance, check the pins on the connector for possibly pushing back into the connector housing.
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Old 09-16-2009, 05:45 PM   #4 (permalink)
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Quote:
Originally Posted by Fmt662 View Post
I looked on OBD-II Trouble Code: P0403 Exhaust Gas Recirculation Circuit Malfunction

there are a few things to look at there...

Use this info in conjunction with my post.
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2008 QC-LB,2500,4X4,White/Kaki,Big-Horn,3.73 Auto, MyGig Nav unit, K&N no baffle,DPF quit working, GHD, Shibby stage 1 intake & boost tube, Smarty, PMT for gauges, Mag-Hytec Pan & Diff covers.Dad2bike-installs-some-shibby-goodies..... DIY Deletes How-To
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Old 09-16-2009, 05:54 PM   #5 (permalink)
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dealer said they did that and it come back to the an pcm problem recommended replacing computer at unreal price!!
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Old 09-16-2009, 05:57 PM   #6 (permalink)
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They void your warranty already?
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Old 09-16-2009, 06:03 PM   #7 (permalink)
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They void your warranty already?
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Old 09-16-2009, 06:34 PM   #8 (permalink)
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Dealer didnt tell me ecm was under cummins warranty! Is it supposed to be? Should be covered for 100000miles if it is right? And no dealer has been very good about performance upgrades and hasnt voided warranty.
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Old 09-16-2009, 06:38 PM   #9 (permalink)
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The ECM should certainly be covered under the 100K warranty. I'd be pretty ticked if they tried to charge you for it.
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Old 09-16-2009, 06:41 PM   #10 (permalink)
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Will contact dealer in morning. Thanks for the info. Dealer knows nothing about 6.7 engine dont know what i would do without this forum!!!
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Old 09-17-2009, 05:47 PM   #11 (permalink)
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Don't know if this will help or not. When I initially unplugged my EGR I got the standard p0405 code that I expected and nothing else. No updates or flashes since then but I did complete the DPF delete a couple of weeks ago. The truck is running great but decided to check codes to see if everything was still good and noticed that I had p0403, p0404, and p0405. Cleared and all came back. Cleared again and plugged back in the EGR and no CEL. Unplugged again and immediately all 3 codes return. Any thoughts?
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