Have engine disable on my dash panel and reduced power

2006 CHEVROLET HHR
217,000 MILES • 2.4L • 4 CYL • 2WD • AUTOMATIC
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JENKINSJ842_1330$
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How do I reset the ECM, BCM, PCU, EXC? i do not have any money I just changed the transmission it ran fine before that now it will not do anything. can you help me?
Mar 15, 2018 at 7:03 AM
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MIKE H R
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You changed the transmission with the same one. Go to some auto store , most reset computers if there is a code. With a 2006, you might get away with disconnecting the battery side. Leaving it off for a couple of minutes then ground the positive side to the ground, {not the battery} but the positive side wire. After a minute replace the positive side cable back on the battery, start the car and you will have to drive it about thirty miles before the computer ECM will reset.
Mar 15, 2018 at 7:31 AM