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The computer module was replaced without being programmed to VIN and wouldn't communicate with a scanner. I put the original ecm back on and same thing. So I need to have it reprogrammed now?
 

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The computer module was replaced without being programmed to VIN and wouldn't communicate with a scanner. I put the original ecm back on and same thing. So I need to have it reprogrammed now?
Does the engine run?
2.2L or 3.2L?
 

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your obd2 gets power from the horn circuit, verify your horn works and proceed from there.
 
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