DTC Advanced Diagnostics: P0459: General Description
The evaporative emission (EVAP) canister purge valve is attached to the vacuum port between the intake manifold and the EVAP canister. The powertrain control module (PCM) turns the EVAP canister purge valve OFF when the engine coolant temperature is low. The PCM adjusts the amount of fuel vapor intake into the engine by controlling the EVAP canister purge valve. If the EVAP canister purge valve control terminal voltage level does not change correctly for a set time, the PCM detects a malfunction and stores a DTC.
Monitor Execution, Sequence, Duration, DTC Type
| Execution | Continuous |
| Sequence | None |
| Duration | 5 seconds or more |
| DTC Type | Two drive cycles, MIL on |