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  1. Help - first time to use OBDII...causes electronics to fail / alarm to go off!

    Diagnostic Equipment
    Help - first time to use OBDII...causes electronics to fail / alarm to go off! Newbie here...I have an ELM OBDII reader which I plugged into our 2004 Range Rover Vogue. That immediately set off a high-pitched alarm sound. I unplugged it but it continued for about 10 minutes. Now various error...
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