Check Engine

Manual-Mecanica
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12 years 8 months before #40987 by manual-mecanica

Check Engine published by Manual-Mecanica

Hello everyone.

I own a Mercedes-Benz W204 350 CGI, and the engine malfunction indicator light has come on twice, giving the error code P0088 (Fuel rail/system pressure too high).
Any ideas on where to start looking?

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12 years 8 months before #41002 by manual-mecanica

Manual-mechanics response on the topic of Check engine

The fuel pressure sensor is likely damaged; it's located on the fuel rail where the injectors are.

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12 years 8 months before - 12 years 8 months before #41013 by manual-mecanica

Manual-mechanics response on the topic of Check engine

Thanks for your reply, sorto73.
That had crossed my mind. Is there any way to check that sensor? And while I'm replacing it, are there any precautions I should take when disassembling/assembling it?
Thanks again.
Could it be part number 55?

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Last edited: 12 years 8 months ago by . Reason: insert parts list

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12 years 8 months before #41022 by manual-mecanica

Manual-mechanics response on the topic of Check engine

Caution is key; do everything carefully and verify that everything is properly assembled. Generally, you need to replace the O-rings (rubber seals) to prevent leaks. For testing, you can use a pump pressure gauge where the allowed range would be 45 to 55 psi (verify data in the workshop manual). Good luck.

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