<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's current performance. This could be due to <causes> such as a faulty coolant pump, electrical issues, or a malfunctioning control module.</li> <li><b>Overheating Engine</b>: An engine that overheats may be a result of the coolant pump not operating efficiently. This can be caused by <causes> such as a failing pump, blocked coolant passages, or electrical faults.</li> <li><b>Reduced Engine Performance</b>: A decrease in engine performance can occur if the coolant pump is not maintaining proper coolant flow. Potential <causes> include a defective pump, wiring issues, or a problem with the control module.</li> </ul>

<ul><li>The engine coolant pump may be faulty, leading to inadequate coolant circulation.</li><li>An open or shorted harness in the engine coolant pump can disrupt the electrical flow.</li><li>Poor electrical connections in the engine coolant pump circuit can cause intermittent or low current performance.</li><li>A malfunctioning Engine Control Module (ECM) can fail to properly regulate the coolant pump's operation.</li></ul>

<ul> <li><b>Initial Scan</b>: Use an OBD-II scanner to confirm the presence of DTC P3075 and check for any additional codes that may be related.</li> <li><b>Visual Inspection</b>: Inspect the engine coolant pump and its electrical connections 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 affect the pump's performance.</li> <li><b>Test Electrical Circuit</b>: Using a multimeter, check the voltage and ground at the coolant pump connector. Ensure the pump is receiving the correct voltage as specified by the manufacturer.</li> <li><b>Inspect Wiring Harness</b>: Examine the wiring harness for any signs of wear, fraying, or damage that could cause a short or open circuit.</li> <li><b>Coolant Pump Operation</b>: Manually activate the coolant pump using a diagnostic tool to verify its operation. Listen for any unusual noises or irregularities.</li> <li><b>Check for Blockages</b>: Inspect the coolant passages and hoses for any blockages that could impede coolant flow and affect pump performance.</li> <li><b>Replace Coolant Pump</b>: If all tests indicate the pump is faulty, replace the engine coolant pump and clear the DTC code. Re-test to ensure the issue is resolved.</li></ul>

<p>The DTC code P3075 indicates an issue with the engine coolant pump's current performance. This is a critical issue as it can lead to engine overheating, causing severe engine damage.</p><ul><li><b>Immediate Actions:</b> Inspect and replace the coolant pump if necessary.</li><li><b>Potential Risks:</b> Delayed repair can result in engine failure and costly repairs.</li></ul>