Well, nothing will tell you exactly what's wrong. Fault codes are just what they are. Yeah, somethings are specific like a faulty sensor, etc., but other items come from combinations of items that require that each item be checked or be sent through a series of checks. Might be three items that control a specific set of parameters, but only one of those items is failing.
I'm not sure if that makes sense to you, but that's the way it is. Think of the code as a clue on where to look. Sometimes, it points to one item. Other times, it points to an area.
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Dave
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