DTC P1451: EVAP Control System Canister Vent Solenoid Circuit Malfunction
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P1451 - EVAP CONTROL SYSTEM CANISTER VENT SOLENOID CIRCUIT MALFUNCTION
| Description: | Monitors the canister vent (CV) solenoid circuit for an electrical failure. The test fails when the signal moves outside the minimum or maximum allowable calibrated parameters for a specified canister vent duty cycle by powertrain control module (PCM) command. | ||
| Possible Causes: |
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| Diagnostic Aids: | To verify normal functioning, monitor the EVAP canister vent solenoid signal PID EVAPCV and the signal voltage (PCM control side). With the valve open, EVAPCV indicates 0% duty cycle and a voltage approximately equal to battery voltage. When the valve is commanded fully closed, EVAPCV indicates 100% duty cycle, and a minimum voltage drop of 4 volts is normal. Output test mode may be used to switch output on/off to verify function. | ||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| All | GO to HX: Evaporative Emission (EVAP) Monitor and System STEP HX31. | ||