Stereo cal err on the display

2004 CHEVROLET MONTE CARLO
120,000 MILES • V6 • RWD • AUTOMATIC
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ELPESCADO
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Stereo turns on and I get a cal err on the display and then after there is no sound at all coming through the speakers. Is there an easy solution?
Nov 2, 2016 at 9:52 PM
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HMAC300
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cal error probably means calibration error, so it may need to be programmed back into the car.
Nov 3, 2016 at 6:07 AM