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i have a 2008 equinox 3.4. its giving me code p0205 for injector 5 circuit open. problem is the injector is just staying wide open dumping fuel into exhaust. i switched wiring from injector 5 to injector 6 and then 6 sprays fuel nonstop. so i know it electrical problem. i traced the ground wire all the way back to the computer and didnt see any breaks or bare spots in wire. could this be a bad ecm? dont know what else to check. thanks in advance
 

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Looking is a physical test but electrical testing is better. Did you electrically check that wire with an ohm/voltmeter for a short to ground etc?
 

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I'm not sure but does ECM ground the injector to fire it or does it power it to fire it. If ECM grounds injector to fire it than a short to ground would keep injector flowing. As 13nox said electrical testing is needed.
 
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