DTC P0459: Evaporative Emission System Purge Control Valve Circuit High
P0459 - EVAPORATIVE EMISSION SYSTEM PURGE CONTROL VALVE CIRCUIT HIGH
| Description: | The powertrain control module (PCM) monitors the state of the evaporative emission (EVAP) canister purge valve circuit output driver. The test fails when the signal moves outside the minimum or maximum limit for the commanded state. | ||
| Possible Causes: |
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| Diagnostic Aids: | To verify normal function, monitor the EVAP canister purge valve signal PID EVAPCP. With the valve closed, the EVAPCP indicates 0% duty cycle. When the valve is commanded fully open, the EVAPCP indicates 100% duty cycle. | ||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| All | GO to PINPOINT TEST HZ . | ||