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DTC P0446: EVAP VENT CONTROL VALVE MALFUNCTION Hyundai Sonata IV

Testing & Diagnostics ~339 words
  1. Turn ignition on. Install scan tool to data link connector, and verify DTC P0446 is set. If DTC P0446 is set, go to next step. If DTC P0446 is not set, ensure ECM connector terminals are clean and tight. Perform repairs as necessary. When repairs are completed, clear DTCs and verify EVAP system operation.
  2. Turn ignition off. Disconnect canister close valve connector. Turn ignition on. Measure voltage between ground and canister close valve connector terminal No. 2 (Pink wire). If battery voltage is present, go to next step. If battery voltage is not present, check OXYGEN SENSOR (15-amp) fuse. If fuse is okay, repair open in Pink wire between canister close valve and engine control relay connector terminal No. 1.
  3. Turn ignition off. Disconnect canister close valve connector, and ECM connector 44-1 (A/T) or 45-3 (M/T). Check continuity between ground and canister close valve harness connector terminal No. 2 (Pink wire). If continuity does not exist, go to next step. If continuity exists, repair short to ground in Pink wire canister close valve and engine control relay connector terminal No. 1. When repairs are completed, clear DTCs and verify EVAP system operation.
  4. Turn ignition off. Ensure canister close valve and ECM connectors are disconnected. Using a jumper wire, connect canister close valve connector terminal No. 1 (White wire) to ground. Measure resistance between ground and ECM connector 44-1 (A/T) terminal No. 24, or connector 45-3 (M/T) terminal No. 2. If resistance is one ohm or less, go to next step. If resistance is more than one ohm, repair open in White wire between canister close valve and ECM. When repairs are completed, clear DTCs and verify EVAP system operation.
  5. Measure resistance between canister close valve terminals No. 1 and 2. If resistance is approximately 25 ohms, verify ECM connectors are clean and tight. If ECM connectors are okay, replace ECM. If resistance is not approximately 25 ohms, replace canister close valve. When repairs are completed, clear DTCs and verify EVAP system operation.

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