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+---- Thread: Mercedes 220d fault code P263509. New to MB (/Thread-Mercedes-220d-fault-code-P263509-New-to-MB)
Mercedes 220d fault code P263509. New to MB - krug - 06-09-2017
Hi to everyone one sicking for little help from MB prof.
I got Mercedes 2011, 220d engine chain at the back of the engine running fine but 1 fault code present
P263509 The fuel flow rate of fuel pump"A" is to low. The is component fault.
1 So got stack don't know what pressure lift pump have to produce
2 Pump A is it lift pump or HP, if is HP it buried at the back of the engine under inlet manifold and looks like half a day work to swap it.
Can someone give me advice with my problem: not shore which pump.
Thanks in advance.
RE: Mercedes 220d fault code P263509. New to MB - krug - 06-09-2017
Any 1 ?
RE: Mercedes 220d fault code P263509. New to MB - AfXv237 - 06-13-2017
Plug in the tester and look at real time data -> Fuel rail pressure and demanded fuel rail pressure and kick down it. I had a problem with a VW Crafter 2014 2.0bi-tdi, it kept going in limp mode with error fuel rail pressure too low. It demanded 1800bar exactly in full gas and the best it ever produced was 1750bar, but constantly around 1650bar. I changed regulator, fuel pump, lift pump, fuel filter, and bunch of other sensors because VW's engine management is shit. All fuel corrections were withing +-0,5mg which is perfect. I sent all the injectors for check and 2 of them were completely faulty (injecting 5 times more than a new one) and other 2 were almost ok.
As for the lift pump, the same VW crafter, made around 4 to 5 bars.
For any more infos maybe you could give the VIN and check it in Mercedes EPC/WIS
RE: Mercedes 220d fault code P263509. New to MB - krug - 07-01-2017
(06-13-2017, 10:12 AM)AfXv237 Wrote: Plug in the tester and look at real time data -> Fuel rail pressure and demanded fuel rail pressure and kick down it. I had a problem with a VW Crafter 2014 2.0bi-tdi, it kept going in limp mode with error fuel rail pressure too low. It demanded 1800bar exactly in full gas and the best it ever produced was 1750bar, but constantly around 1650bar. I changed regulator, fuel pump, lift pump, fuel filter, and bunch of other sensors because VW's engine management is shit. All fuel corrections were withing +-0,5mg which is perfect. I sent all the injectors for check and 2 of them were completely faulty (injecting 5 times more than a new one) and other 2 were almost ok.Thanks for unswer, i did figure out . It was a fule filter fault becase pressure sensor bild in in fuel filter, So i have chaned filter and fault gone.
As for the lift pump, the same VW crafter, made around 4 to 5 bars.
For any more infos maybe you could give the VIN and check it in Mercedes EPC/WIS