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juliusice1

EQC power loss and check engine light

I'm having a possible issue with my 2019 Mercedes EQC, electric engine, currently at 227020 km. I've observed a noticeable reduction in engine power, and the check engine light is on. Could a defective throttle valve be the cause? I suspect a fault within the accelerator pedal module or its electronics. What could it be?

Summary of the thread

A 2019 Mercedes EQC is experiencing reduced engine power and a check engine light, possibly due to a defective throttle valve or issues within the accelerator pedal module or its electronics. The symptoms, including response delay during acceleration, suggest a faulty throttle position sensor. It is recommended to have the accelerator pedal module or electronics inspected at a workshop to address the issue.

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4 comment(s)

isabelllight14

The symptoms you describe sound like a throttle sensor malfunction. Have you observed any response delay or impact on fuel efficiency along with the power reduction? My EQC had similar issues. A defective throttle sensor can trigger the check engine light.

juliusice1 (community.author)

Thank you for your input. I have noted a response delay, especially during initial acceleration. Could this issue significantly affect fuel efficiency? The potential impact on engine idling is also a concern.

isabelllight14

Yes. The response delay and reduced fuel efficiency strongly suggest a faulty throttle position sensor. I advise you have the accelerator pedal module or the electronics inspected. I paid about 265€ for the replacement. Given your symptoms, a workshop visit is needed.

juliusice1 (community.author)

I appreciate the clarification. I will arrange for a workshop inspection soon. Your insights regarding the likely cause and potential replacement cost are invaluable. Thank you for your help.

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MERCEDES

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EQC