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DTC P0443: Evaporative (EVAP) Control System Purge Flow Incorrect

  1. Check evaporative canister purge system. See EVAP CANISTER PURGE SYSTEM in SYSTEM & COMPONENT TESTING article. If canister purge system operation is not as specified, go to next step. If operation is as specified, problem is intermittent. See INTERMITTENTS in TROUBLE SHOOTING - NO CODES article. If no intermittent problems were found, replace PCM and retest system.
  2. Check evaporative canister purge valve resistance. See EVAP CANISTER PURGE VALVE in SYSTEM & COMPONENT TESTING article. If resistance is not as specified, replace purge valve and retest system. If resistance is as specified, check Green/Black wire between purge valve and PCM for open or short circuit. Also check Blue/Black wire between purge valve, main relay and PCM for open or short circuit. Repair as necessary. If wiring and connections are okay, replace PCM and retest system.
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