OBD-II code · Powertrain (generic, extended)
P24BB EVAP System Leak Detection Pump Pressure Sensor Circuit High
Same as P24B8 with the signal voltage above 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.
Is it safe to drive with P24BB?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySignal shorted to supply
- Less likelyConnector pins corroded - high contact resistance
- Less likelySupply wire pinched against B+ source
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
- P24B8EVAP System Leak Detection Pump Pressure Sensor Circuit
- P24B9EVAP System Leak Detection Pump Pressure Sensor Circuit Range or Performance
- P24BAEVAP System Leak Detection Pump Pressure Sensor Circuit Low
- P24BCEVAP System Leak Detection Pump Pressure Sensor Circuit Intermittent
- P24BDEVAP System Leak Detection Pump Switching Valve Control Circuit Open
- P24BEEVAP System Leak Detection Pump Switching Valve Control Circuit Low
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.