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post #1 of 2 Old 03-30-2019, 12:10 AM Thread Starter
stevep12
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Unhappy engine codes

I havent been here in a while...but need some suggestions...a while back i had gotten a P0404 code on D. I ended up changing the EGR valve. Now sporadically on and off, I am getting a P0405 code and a P0406 code. Sometimes both at once. The P0405 code is Exhaust Gas Recirculation Sensor Circuit A Low and a P0406 is a Exhaust Gas Recirculation Sensor Circuit A High. Im not sure what exactly this means..and I dont get how I can get 2 different codes like this at once, if one is high and one is low....
I dont know what else i gcould need to change...and I dont know is it just possible the EGR valve I bought is bad?
I read a thing about a false code thing with needing the PCM re-flashed.

I do know that there is some odd smell from my exhaust that I cannot place. I personally dont think it is the same rotten egg smell from a bad cat...i just dont really know.
After a few days the code light will just go off by itself.

Traded in - 2004 Molten Red Ram 1500 Quad Cab 4x4 5.7L Hemi
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post #2 of 2 Old 04-21-2019, 10:39 PM Thread Starter
stevep12
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So my saga is getting worse. today I was at the gas station shut it down, got gas, and when I tried to start it..it didnt want to. But oddly...the start kept trying to start the engine even after I let go of the key. I tried again, and it started chugged a bit, shut down. I waited a minute got it running, but a lot of lights going crazy...and no mater what, could not get going over 10MPH. limped home, almost didnt make it up the incline, shut it down, checked codes, got 4 codes. P0104 I think was one. P0335, P0520 and P0406.
One of those is the oil pressure sensor, one is the crankshaft sensor, one says unknown code and one if the EGR valve sensor. EGr valve is new...
Could it be the TIPM?

Traded in - 2004 Molten Red Ram 1500 Quad Cab 4x4 5.7L Hemi
Now own 2007 Duraango Limited
4x4 5.7L Hemi
Marine Blue Pearlcoat
265/50R20 Goodyear Forterra tires
Stock Chrome rims
6 disc changer with Alpine speakers and sub
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