Powertrain
generic / SAE
P24D7
EVAP System Pressure Sensor or Switch B Circuit Low
Same as P24D5 with the signal voltage below the plausible range. 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
GroupP2
Range / number4 / D7
Possible causes
- Signal shorted to ground high
- Connector pins corroded - high contact resistance low
- Harness chafing through insulation 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: easy
- DIY: possible
- Estimated cost: 80–280 €
- Estimated time: 0.4–1.4 h
- Component: evap pressure sensor b
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012