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Old Dec 18, 2020 | 08:30 AM
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1965 Beto's Avatar
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PO088 code
Hello fellas, Yesterday my "SEL" pops and after scanning I got code PO088 (Fuel rail system pressure too high) and noticed the sensor is located at the fuel rail next to the oil cap.

My car is a 2014 E250 BT

Has anyone tackle this with replacing the sensor and fix the issue or is there more to it?

TIA
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Old Dec 18, 2020 | 08:49 AM
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2016 E350 Sport
Originally Posted by 1965 Beto
Hello fellas, Yesterday my "SEL" pops and after scanning I got code PO088 (Fuel rail system pressure too high) and noticed the sensor is located at the fuel rail next to the oil cap.

My car is a 2014 E250 BT

Has anyone tackle this with replacing the sensor and fix the issue or is there more to it?

TIA
As long as the car is functioning properly, first thing to do is to clear the code and wait... to see if the code (ever) returns.

I would not start throwing parts in the engine bay until it's proven to be a persistant code problem.
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Old Dec 18, 2020 | 09:22 AM
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Originally Posted by DFWdude
As long as the car is functioning properly, first thing to do is to clear the code and wait... to see if the code (ever) returns.

I would not start throwing parts in the engine bay until it's proven to be a persistent code problem.
I hear you. I did clear the code, but it did come back again
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Old Dec 18, 2020 | 10:10 AM
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Originally Posted by 1965 Beto
I hear you. I did clear the code, but it did come back again
OK, that's good. Next step is to wait for others to respond, because I did a forum search on this code and found NOTHING, which is VERY odd.
Last edited by DFWdude; Dec 18, 2020 at 10:15 AM.
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Old Dec 18, 2020 | 10:59 AM
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Either the sensor is bad, wiring to sensor or the actual fuel pressure is too high. Do you have access to a scanner with live data?
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Old Dec 18, 2020 | 11:03 AM
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Originally Posted by bmwpowere36m3
Either the sensor is bad, wiring to sensor or the actual fuel pressure is too high. Do you have access to a scanner with live data?
How about measuring the fuel rail pressure with a gauge?
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Old Dec 18, 2020 | 11:06 AM
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'11 E350, '11 E550, '98 M3, '95 E320
Originally Posted by Arrie
How about measuring the fuel rail pressure with a gauge?
There you go... and check that against the sensor with live data would rule it out. I was thinking his car was a diesel, so whether is has a fuel rail port and then the pressure you'd be dealing with.
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Old Dec 18, 2020 | 12:32 PM
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Thank you fellas
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Old Jan 5, 2021 | 10:05 AM
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Well, my mechanic toll me the fuel pump is bad, $1K to replace, UGH!
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Old Jan 5, 2021 | 10:23 AM
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Fuel pump search current part # 2124700194. Replacement procedure, see attachments.
Attached Files
File Type: pdf
651 fuel pump.pdf (665.4 KB, 108 views)
File Type: pdf
rear seat cushion.pdf (534.3 KB, 122 views)
File Type: pdf
Open, close latch.pdf (129.1 KB, 120 views)
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Locking ring.pdf (918.5 KB, 90 views)
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642 fuel level sensor.pdf (366.3 KB, 204 views)
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Old Jan 5, 2021 | 01:12 PM
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Thanks for the info KONIGSTIGER. It seems like a tedious job.
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Old Jan 5, 2021 | 01:15 PM
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Originally Posted by 1965 Beto
Well, my mechanic toll me the fuel pump is bad, $1K to replace, UGH!

Doubt that this is a possible repair but the reason that the fuel pressure would be high and the pump need replacing is that there must be a pressure regulator built into the pump. Wondering if that can be replaced / repaired on it's own.
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Old Jan 15, 2021 | 04:22 PM
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UPDATE, after replacing the fuel pump and driving the car for a few weeks, the cars performance and MPG when down and an engine vibration. Toke it back and the Mechanic says I need a new fuel rail that will cost me another $1600 My extended warranty will cover only half that.
After the replacement of fuel rail, car still running like **** and the ENGINE LITE came on with a PO2002. (Dirty DPF)
At this point, if the car is not fixed properly, This guys is taking a trip with me to the court house soon

I miss my car
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Old Jan 15, 2021 | 04:37 PM
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I'm with bmwpowere36m What is wrong with the fuel rail? Seems like an excuse to change another part to me. Is there a fuel rail pressure sensor? Has that been tested? Has the FRP sensor CIRCUIT been tested?
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Old Feb 10, 2021 | 03:55 PM
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Well, bad news. The repair cost me $2,800.00 (fuel rail and fuel pump) and now the car runs very rich which damaged the DPF and O2 sensor
The mechanic told me I need to go to the dealer to have the PCM re-flashed ($400) and the car still running like crap.
Then he said that is an emission system defect and it can be replace for free as for FEDERAL EMISSION LAW.

I cant believe a got hosed by this guy. Hes going to court soon

Im so pissed
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Old Apr 13, 2021 | 03:01 PM
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Well, it turned out, theres a class action law sue against MB in regards to Diesel engines starting in models 2014 Sprinters and cars with both 4 and 6 cylinders Bluetec.
And for those of you thinking about buying a newer Diesel from MB...DONT FALL FOR THIS NIGHTMARE IM GOING THRU

Read: https://www.hbsslaw.com/press/merced...ails-announced
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