P0555high severityPowertrain
Brake Booster Pressure Sensor Circuit Range/Performance
on 2023 Chevrolet Bolt EUV 65 kWh Single Motor FWD · FWD
What this code means
The brake booster pressure sensor signal is outside the expected range. The reading does not match actual booster vacuum or pressure conditions.
Symptoms
- Check engine light on
- Hard brake pedal feel
- Possible cruise control disable
Common causes
- Faulty brake booster pressure sensor
- Vacuum leak at booster
- Damaged wiring or connector
- Faulty PCM
Diagnostic steps
- Retrieve freeze frame data
- Check booster vacuum with a gauge
- Inspect sensor wiring and connector
- Replace pressure sensor if faulty
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