Technical P0091 how you can solve this problem?

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Technical P0091 how you can solve this problem?

Timy

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Jan 15, 2018
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Hello Dear Friends,
It's my first day in the forum.I'm owner of a Fiat Sedici 1.9 tdi model 2007.
My problem is that many times the car when accelerate fall in safe mode and the check engine lighting.when check in pc find the damage with code P0091..
Also have big consumption (about 9lt/100km) and feel that when accelerate don't give all the power something hold the engine power,so that the reason that sometimes fall in safe mode.
Can anyone help about this?what i have to check first to the engine?
Thanks..
 
Low fuel pressure in rail. Graph desired fuel pressure vs. actual fuel pressure to determine if the sensor is reporting anything sensible at all. Check for fuel leaks (wet spots around rail and hp pump). Check injector leak back and correction factors; a broken injector can bleed the hp fuel rail right back into the fuel damper, preventing the build-up of fuel pressure necessary to achieve full power. Check fuel filter for clogging - if the hp pump is starved for fuel it will force the engine into limp home mode.
 
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