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I'm getting codes on my srt8. Mostly p4 but one other also. Any help? I have a code reader from auto zone but haven't used it yet.
 

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P004 is Fuel Volume Regulator Control Circuit High, but it's not used that often... Could be the regulator or fuel rail sensor if there is one? What were the other codes?

Also I've seen this code come up 'by mistake' on some ODBII readers that just don't work quite right....

How's the car running any issues?
Tim
 
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