OBD-II code · Powertrain (generic, extended)
P24D5 EVAP System Pressure Sensor or Switch B Circuit
A general circuit fault on the secondary EVAP system pressure sensor or switch B. 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.
Is it safe to drive with P24D5?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyOpen in sensor or wiring
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
- Easy
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.4–1.4 h
- Emissions test
- Likely to fail
- Parts involved
- Evap Pressure Sensor B
Related codes
- P24D2Reductant Heater A Sense Circuit
- P24D3Reductant Heater B Sense Circuit
- P24D4EGR Cooler Coolant Pump Feedback Circuit
- P24D6EVAP System Pressure Sensor or Switch B Circuit Range or Performance
- P24D7EVAP System Pressure Sensor or Switch B Circuit Low
- P24D8EVAP System Pressure Sensor or Switch B Circuit High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.