P0266high severityPowertrain
Cylinder 2 Contribution/Balance
on 2023 Chevrolet Bolt EUV 65 kWh Single Motor FWD · FWD
What this code means
The PCM detects that cylinder 2 is not contributing its expected power or fuel balance. This indicates uneven cylinder performance.
Symptoms
- Rough running
- Power imbalance
- Vibration
Common causes
- Faulty cylinder 2 injector
- Low compression on cylinder 2
- Injector wiring fault
- Mechanical engine issue
Diagnostic steps
- Scan and note balance data
- Perform cylinder contribution test
- Check compression on cylinder 2
- Repair injector or address mechanical fault
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P0033
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