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DTC stands for 'diagnostic trouble code'. The code is obtained by having your engine computer (PCM) scanned with an OBD-II code reader. Some auto parts stores will do this for free (AutoZone), others charge a small fee. An OBD-II scanner can also be purchased for $100-$300 or so, depending on features (even less on E-bay). Others can cost thousands (Tech-II, etc.), and have software updates annually. I recommend having some kind of scanner if you plan to do any mechanical engine work on a post 1997 vehicle.

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Q: What does code DTC for 2004 Dodge Durango mean?
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