mikafrost1

Mercedes A Klasse Engine Power Loss and Check Engine Light

My 2021 Mercedes A Klasse with a gasoline engine is showing some concerning issues. I've noticed a drop in engine power, and the check engine light is on. It might be the throttle valve, either the accelerator pedal module or the throttle body itself. Could a bad throttle body cause limp mode? What would a replacement cost?

4 comment(s)

That sounds right. A bad throttle body can cause those problems. It's like a clogged artery. Is the engine idling rough? Have you looked for air leaks in the intake?

The engine idles a bit rough. I checked for air leaks but didn't see any. Can I figure out the exact problem without special tools? Would a multimeter help, or am I wasting time?

You could use a multimeter, but it's like trying to fix a computer with a screwdriver. These systems are complex. It sounds like the throttle body. I'd suggest a shop visit before you get stuck somewhere. They can figure it out and tell you the replacement cost.

Thanks for the advice. I'm taking it to the Mercedes service center. The final cost was 265€ for the throttle body replacement, including parts and labor. The problem is fixed.

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