Answer
Nov 11, 2024 - 01:05 PM
To check an exhaust gas recirculation (EGR) valve, first visually inspect it for any signs of damage, carbon buildup, or clogging. Then, test its functionality by applying vacuum (for vacuum-operated EGR valves) or using a multimeter to check electrical signals (for electronic EGR valves) while the engine is running. If the valve doesn't open or close properly in response to these tests, it may need cleaning or replacement.
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