P0129low severityPowertrain
Barometric Pressure Too Low
on 2023 Chevrolet Bolt EUV 65 kWh Single Motor FWD · FWD
What this code means
The barometric pressure sensor is reporting a value that is lower than expected. This affects fuel and timing calculations.
Symptoms
- Check engine light on
- Poor fuel economy
- Hesitation or rough running
Common causes
- Faulty barometric pressure sensor
- Vacuum leak affecting MAP reading
- Wiring or connector fault
- Faulty PCM
Diagnostic steps
- Read barometric pressure value with scan tool
- Compare to known local barometric pressure
- Inspect sensor wiring and connector
- Replace sensor if faulty
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