thomas_mayer6

Mercedes SL Fuel Rail Pressure Sensor Problem

My 2020 Mercedes SL with a gasoline engine is acting up. The check engine light is on, and it stalls at idle. It also feels like it has lost power. I scanned it and it shows a fault with the fuel rail pressure sensor. The mileage is 230426 km. Has anyone encountered this before? I am considering a new fuel pressure sensor but want another opinion first.

A 2020 Mercedes SL was experiencing issues with the check engine light, stalling at idle, and a loss of power. A diagnostic scan indicated a fault with the fuel rail pressure sensor. Before replacing the sensor, it was suggested to check the wiring and connector for any damage or corrosion. After confirming the wiring was intact, the sensor was replaced, resolving the issues and restoring the vehicle's performance.

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4 comment(s)

Fuel rail pressure sensor issues can be tricky. Before replacing it, double-check the wiring and connector to the sensor. Ensure there's no corrosion or damage because a bad connection can mimic a faulty sensor. Have you noticed any issues with your fuel injection recently or strange noises from the fuel pump?

Thanks for the quick reply. I will check the wiring, but if it looks good, is a sensor replacement pretty much guaranteed? I haven't noticed any other problems with the fuel injection or any weird noises from the pump.

If the wiring is solid and you're still getting the fault code and symptoms, the sensor is the most likely cause. I've seen this a few times. However, with those symptoms, especially the engine stalling, I'd strongly recommend having it checked by a decent workshop. Fuel pressure problems can cause real damage if not addressed properly.

I appreciate the advice. I took it to a shop. You were right; it was the fuel rail pressure sensor. They replaced it, and the check engine light is off, the stalling issue is fixed, and the power is back. It cost me around 240€ for the repair.

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MERCEDES

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