EVAP System Leak Detection Pump Pressure Sensor Circuit High

Where it lives

For P24BB, the circuit described runs through the sensor. The description of P24BB reports a fault at the sensor.

Check these first

• An EVAP leak detection pump pressure sensor signal wire shorted to voltage
• A failed EVAP leak detection pump pressure sensor
• High resistance in the pressure sensor ground
• A chafed pressure sensor harness near the EVAP pump

What to do next

1. Read the EVAP leak detection pump pressure sensor on a scan tool
2. Test the pressure sensor signal wire for a short to voltage
3. Check the pressure sensor ground for high resistance
4. Inspect the pressure sensor harness for chafe
5. Replace the EVAP leak detection pump pressure sensor if the circuit tests good
6. Clear the code and retest

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