<ul> <li><b>Engine Light ON (or Service Engine Soon Warning Light)</b>: The illumination of the engine light indicates a detected issue with the engine coolant pump. This could be due to an electrical fault causing high current draw.</li> <li><b>Overheating Engine</b>: An engine coolant pump drawing high current may not be operating efficiently, leading to inadequate coolant circulation and potential engine overheating.</li> <li><b>Reduced Engine Performance</b>: The engine control unit (ECU) may limit engine performance to prevent damage, resulting in noticeable power loss.</li> <li><b>Unusual Noises from Engine Bay</b>: A failing coolant pump may produce unusual noises, such as whining or grinding, due to electrical or mechanical issues.</li> </ul>

<ul><li>The engine coolant pump may be faulty, leading to excessive current draw.</li><li>An open or shorted harness in the engine coolant pump can disrupt normal operation.</li><li>Poor electrical connections in the engine coolant pump circuit can cause high current issues.</li><li>A malfunctioning Engine Control Module (ECM) might incorrectly regulate the coolant pump, resulting in high current.</li></ul>

<ul> <li><b>Initial Scan</b>: Use an OBD-II scanner to confirm the presence of DTC P3074 and check for any additional codes that may be related.</li> <li><b>Visual Inspection</b>: Inspect the engine coolant pump and its wiring for any visible damage, corrosion, or loose connections.</li> <li><b>Check Coolant Level</b>: Ensure the coolant level is within the recommended range. Low coolant levels can cause the pump to work harder, leading to high current draw.</li> <li><b>Test Coolant Pump Relay</b>: Verify the operation of the coolant pump relay. A faulty relay can cause high current draw.</li> <li><b>Measure Current Draw</b>: Use a multimeter to measure the current draw of the coolant pump. Compare the readings with the manufacturer's specifications.</li> <li><b>Inspect Control Module</b>: Check the Engine Control Module (ECM) for any signs of damage or malfunction, as it controls the coolant pump operation.</li> <li><b>Check for Short Circuits</b>: Inspect the wiring harness for any short circuits or grounding issues that could cause high current draw.</li> <li><b>Replace Coolant Pump</b>: If all other components are functioning correctly, consider replacing the engine coolant pump as it may be faulty.</li></ul>

<p>The DTC code P3074 indicates an issue with the engine coolant pump drawing high current. This is a critical issue as it can lead to engine overheating, potentially causing severe engine damage.</p><ul><li><b>Immediate Actions:</b> Inspect the coolant pump for electrical faults or blockages.</li><li>Check the wiring and connectors for any signs of damage or corrosion.</li><li>Replace the coolant pump if necessary.</li></ul><p>Delaying repair can result in significant engine damage and costly repairs.</p>