Check Engine Light
Can anybody help me with the Check Engine light? When I turn the key the Check Engine light comes on but then goes off once the engine starts. Is this a bulb check or do I have a problem? Also can anybody recommend a tool for reading fault codes? My Disco is a ’96 300 TDI
I have seen a few references to something called TestBook which I assume is a diagnostics program. Is this available to us or is this a main dealer tool?
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