EGR Valve problems - Hemi Truck Club
 
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Old 11-02-2018, 08:28 AM   #1
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Angry EGR Valve problems

2004 dodge ram 1500 5.7L. I have replaced my egr Valve twice and check engine light comes and goes whenever it wants and throws the code, P0404. U changed throttle body egr tude and still no change also fuel mileage dropped about 5mpg. Any info on what to try next would be great. Thank you

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Old 11-02-2018, 10:31 AM   #2
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That’s a position sensor perf issue. If you have changed the valve a few times and keep getting the same code then you may have a wire issue or a bad pcm. First thing I would do is relive the valve from the head and start the truck make sure you hear loud exhaust pops coming from the cylinder head. If the flow is good then start chasing the wires back to the computer and make sure to pay attention near the back corner they like to melt and chafe there.
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Old 11-03-2018, 10:06 AM   #3
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Maybe take a look at this.
https://www.obd-codes.com/p0404
Use a oem egr valve.. or cmr tune it out and block it off.
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