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2006 Dodge Ram 1500 5.7 Hemi Code P0405


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#1 aero654

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Posted January 22, 2009 at 07:01 pm

2006 Dodge Ram 5.7 Hemi. 60k miles. "Engine" light just came on yesterday. Took it to AutoZone tonight and had them put the scan tool on it. Code P0405 - EGR Sensor A Circuit Low. Not sure where to start here. Truck is running fine and I wouldn't know anything was wrong but for the light on the dash. Parts guy reset the light but it came back on as soon as I pulled out of the parking lot. I don't have a service manual for this vehicle yet, so I'm not sure where to begin. The parts guy said something about running some type of cleaner through the gas tank but that didn't sound like it would be a likely fix so I really didn't pay much attention to him. Can anyone help me figure out what to do first? Thank you very much

#2 ImperialCrown

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Posted January 23, 2009 at 03:44 am

There is a TSB #18-027-07 for erroneous EGR codes that involves reprogramming the PCM/TCM for trucks built before Feb 15 2007. It's also entirely possible that the fault code is really a defective EGR, but the flash is where I would start. It should be covered under the 8/80 warranty outside of diagnostics that may be determined to be necessary.


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