P1503high severityPowertrain
System Voltage High/Low
on 2023 Chevrolet Bolt EUV 65 kWh Single Motor FWD · FWD
What this code means
The system voltage is outside the acceptable operating range. Related to generic charging codes like P0562/P0563.
Symptoms
- Battery warning light
- Dimming or flickering lights
- Hard starting
Common causes
- Faulty alternator
- Bad battery or connections
- Corroded ground straps
- Damaged charging wiring
Diagnostic steps
- Scan for stored codes
- Measure battery voltage
- Test alternator output
- Inspect grounds and connections
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Other Powertrain codes on this vehicle
P0070
Ambient Air Temperature Sensor Circuit
P0071
Ambient Air Temperature Sensor Range/Performance
P0072
Ambient Air Temperature Sensor Circuit Low
P0073
Ambient Air Temperature Sensor Circuit High
P0115
Engine Coolant Temperature (ECT) Sensor 1 Circuit
P0116
ECT Sensor 1 Circuit Range/Performance
P0117
ECT Sensor 1 Circuit Low Input
P0118
ECT Sensor 1 Circuit High Input
P0119
ECT Sensor 1 Circuit Intermittent
P0125
Insufficient Coolant Temperature for Closed Loop Fuel Control