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6E-74 Engine Control System (4HK1) P0380 66 ON Glow Plug Relay • The ignition switch is ON. • The battery voltage is between 16 – 32 Either of following • The ECM detects a low voltage • The ECM detects a high voltage • Relay voltage feed circuit is open circuit or high • Relay control circuit is short to battery, ignition • Poor harness connector connection. • Faulty relay. P0381 67 OFF Glow Plug Lamp • The ignition switch is ON. • The ignition voltage is more than 18 Either of following • The ECM detects a low voltage • The ECM detects a high voltage • Lamp voltage feed circuit is open circuit or high • Lamp control circuit is short to battery, ignition • Poor harness connector connection. • Faulty instrument panel cluster. • Faulty lamp. P0485 44 ON EGR Valve • DTCs P1630 and P1635 are not set. • The ignition switch is ON. • The ignition voltage is more than 18 • The ECM detects that the EGR valve • Sensor 5V reference circuit is short to ground • Sensor 5V reference circuit is open circuit, • Sensor signal circuit is open circuit, high • Poor harness connector connection. • Faulty sensor. (EGR valve) • Faulty ECM. DTC Flash MIL Status DTC Name Condition for Running the DTC Condition for Setting the DTC Possible Cause |