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Alfa Romeo
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2019
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Giulia Base, AWD
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Repair and Diagnosis
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Engine Performance
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System
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2.0L - DTCS P1128-00 To P1E39-00
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DTC Troubleshooting
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P1C8B-00-Battery Voltage
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Set Condition
Set Condition
The difference between the Battery voltage signal received over the CAN C bus and the Battery voltage on the Fused B+ circuit at the Powertrain Control Module is more than 0.75 volts indicating an irrational IBS signal voltage.