Powertrain
generic / SAE
P0469
EVAP Purge Flow Sensor Circuit Intermittent
EVAP purge flow sensor 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 / 69
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: 40–500 €
- Estimated time: 0.5–2.5 h
- Component: evap purge flow sensor
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012