CARWATCH
U0100 Error on Chevrolet
What it means and how to fix it
🚨 Fault Description (U0100)
The DTC code U0100 in a Chevrolet vehicle is a sign that the onboard computer has registered the following anomaly:
"Lost Communication With ECM/PCM 'A'"
Although this is a standardized OBD2 code, the symptoms and the location of the faulty sensor can vary depending on the exact model of your Chevrolet (year, engine type, etc).
Other frequent faults detected in Chevrolet:
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To clear the engine light and read the U0100 code from your phone, you need an OBD2 adapter compatible with the Chevrolet ECU.
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