OBD-II code · Powertrain (generic, extended)
P24B9 EVAP System Leak Detection Pump Pressure Sensor Circuit Range or Performance
Same as P24B8 with the signal in plausible range yet not matching the pump operating curve. 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 P24B9?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySensor element drifted
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
- 0.6–1.8 h
- Emissions test
- Likely to fail
- Parts involved
- Evap Leak Detection Pump Pressure Sensor
Related codes
- P24B6Particulate Matter Sensor Heater Control Circuit High
- P24B7Particulate Matter Sensor Heater Resistance
- P24B8EVAP System Leak Detection Pump Pressure Sensor Circuit
- P24BAEVAP System Leak Detection Pump Pressure Sensor Circuit Low
- P24BBEVAP System Leak Detection Pump Pressure Sensor Circuit High
- P24BCEVAP System Leak Detection Pump Pressure Sensor Circuit Intermittent
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.