Engine Error
P0459
Evaporative Emission System Purge Control Valve Circuit High
Severity
Medium
Symptoms
Check engine light, engine running rich, EVAP system constantly purging
Common Causes
- Short to battery voltage in purge valve circuit
- Failed EVAP purge valve (stuck open)
- Wiring harness chafing
- Internal PCM short
How to Fix
- 1 Repair short to voltage in the harness
- 2 Replace the EVAP purge control valve
- 3 Reroute and protect wiring
- 4 Diagnose PCM
Estimated Repair Cost
USD
$80
–
$250
Purge valve replacement: $100 - $200