Powertrain
generic / SAE
P0454
EVAP System Pressure Sensor/Switch A Circuit Intermittent
EVAP pressure sensor A signal jumps or drops out intermittently. The evaporative system captures fuel vapor from the tank and purges it into intake; leaks or stuck purge valves leak hydrocarbons and cause emissions failures.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number4 / 54
Possible causes
- Intermittent connector high
- Connector with intermittent contact under vibration low
- Harness routed against vibrating component low
Symptoms
- Check engine light on
- Possible smell of fuel near tank or engine bay
- Failed emissions inspection
- Loose-cap warning may appear
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 40–400 €
- Estimated time: 0.5–2 h
- Component: evap pressure sensor
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012