P1640moderate severityPowertrain
Output Driver Module A
on 2023 Chevrolet Bolt EUV 65 kWh Single Motor FWD · FWD
What this code means
The PCM detected a fault in output driver module A, which controls several actuator circuits. Affected outputs may not operate correctly.
Symptoms
- Check engine light on
- Multiple actuator faults
- Component not operating
Common causes
- Faulty PCM
- Shorted output circuit
- Wiring harness short to ground
- Failed actuator on the driver circuit
Diagnostic steps
- Scan for related output circuit codes
- Inspect affected actuator wiring
- Test output circuits for shorts
- Replace PCM if internal driver failed
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