Therefore, any fuel pump relay issues will affect fuel flow to the combustion chamber, and your vehicle might have problems starting. An engine runs on fuel just like the heart of a human runs on oxygen and blood. The fuel pump relay going bad can affect the fuel pump’s power and affect fuel delivery to the engine. If the fuel pump relay suddenly fails, it will light up the check engine light and store a trouble code relating to the fuel pressure. The ECU monitors the fuel pressure with the help of the fuel pressure sensor. A check engine light is also the most common sign of a bad fuel pump relay. If the ECU suspects any sensor is giving an incorrect value, it will light up the check engine light. The engine control module monitors all engine sensors to ensure they do not show the wrong values. Here is a more detailed list of the signs of a bad or failing fuel pump relay to look for: 1. The relay can fail for many reasons, from dust to electrical power surges anything can affect the well-being of a fuel pump relay. If your car won’t start at all and you can’t hear the fuel pump when you turn on the ignition, it could also be due to a bad fuel pump relay. The most common symptoms of a bad fuel pump relay are a stalling engine, performance issues, and a check engine light on your dashboard. Conclusion Symptoms Of A Bad Fuel Pump Relay
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