OBD-II code · Powertrain (generic)
P0450 EVAP System Pressure Sensor/Switch A Circuit
A general electrical fault on EVAP pressure sensor/switch A — used to monitor canister pressure during leak-detection diagnostics.
Is it safe to drive with P0450?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySensor failed
Symptoms
- Check engine light on
- Possible smell of fuel near tank or engine bay
- Failed emissions inspection
- Loose-cap warning may appear
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–2 h
- Emissions test
- Likely to fail
- Parts involved
- Evap Pressure Sensor
Related codes
- P2B7AEVAP System Pressure Sensor/Switch C Circuit
- P044DEGR Sensor C Circuit High
- P044EEGR Sensor C Circuit Intermittent/Erratic
- P044FSecondary Air Injection System Switching Valve A Circuit High
- P0451Evaporative Emission System Pressure Sensor Range/Performance
- P0452Evaporative Emission System Pressure Sensor Low Input
- P0453Evaporative Emission System Pressure Sensor High Input
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.