DTC P0443: Evaporative Emission System Purge Control Valve Circuit
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DTC P0443: EVAPORATIVE EMISSION SYSTEM PURGE CONTROL VALVE CIRCUIT
| 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 EVMV or EVAPCP and the signal voltage (PCM control side). With the valve closed, the EVMV indicates 0 mA (0% duty cycle for EVAPCP) and voltage approximately equal to battery voltage. When the valve is commanded fully open, EVMV indicates 1, 000 mA (100% duty cycle for EVAPCP) and a voltage drop of 3 volts minimum 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 PINPOINT TEST HX . | ||