P1459

P1459
The scan tool indicates Diagnostic Trouble Code (DTC) P1459: Evaporative emission (EVAP) purge flow switch malfunction.

DESCRIPTION
By monitoring the output of the EVAP purge flow switch at idle, the ECM detects malfunctions in the EVAP purge flow switch circuit.

Possible Causes
- EVAP Purge Flow Switch
- EVAP Purge Flow Switch Circuit
- Vacuum lines
- ECM/PCM