Dtc 406 - Hemi Truck Club
 
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Old 02-08-2009, 08:10 PM   #1
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Dtc 406

Hi, The wife was driving and the check engine lite can on. I checked and found got this DTC 406 code. I cleared the code to make sure it was not a one time deal and it came back. What I have found is that it means EGR Exhaust Gas Recirculation Circuit High. Anyone have anything different? Now is this the ERG valve going bad or something else? Anyone else have this? I used a superchips tuner to read and clear the codes. It's 2006 with 5.7 and 50K miles on it overall runs great.
Thanks
Pete

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Old 02-08-2009, 10:01 PM   #2
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Dtc 406

from the DR Service Book...


"Possible Causes"
*EGR POSITION SENSOR SWEEP
*INTERMITTENT CONDITION
*(K34) EGR POSITION SENSOR SIGNAL CIRCUIT SHORTED TO (F856) 5-VOLT SUPPLY CIRCUIT
*(K34) EGR POSITION SENSOR SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE
*EGR SOLENOID ASSEMBLY
*(K34) EGR POSITION SENSOR SIGNAL CIRCUIT OPEN
*(K900) SENSOR GROUND CIRCUIT OPEN
*PCM

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Old 02-09-2009, 03:08 PM   #3
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Dtc 406

Thanks,
Checked with a few others and they have had this problem too around 50k. I guess i will be changing the EGR valve out.
Pete
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Old 07-29-2009, 06:06 PM   #4
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Dtc 406

I just got the same code. Did changing that fix the problem?

05 hemi w/ about 44500 mi
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