Technical P0091 error 1.6mjt

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Technical P0091 error 1.6mjt

petros3p

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After the error I have changed that fuel rail sensor.
Surprisingly I get the same reading again?
The car runs better but not as it should.
I have taken a photo of the diagnostic.
In the green circle is the desired pressure at 270 bar.
In the orange circle bellow it is the actual reading at 69.50 bar.
When the accelerator is pressed the pressure is not rising at all.
The car has power but it's less responsive (lag).
I think I need some help.
 

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After the error I have changed that fuel rail sensor.
Surprisingly I get the same reading again?
The car runs better but not as it should.
I have taken a photo of the diagnostic.
In the green circle is the desired pressure at 270 bar.
In the orange circle bellow it is the actual reading at 69.50 bar.
When the accelerator is pressed the pressure is not rising at all.
The car has power but it's less responsive (lag).
I think I need some help.


If you are sure the sensor is a good one I'd be looking at getting a independent pressure reading from a gauge connected up to the fuel rail
If that matches the sensor reading your probably looking at a defective high pressure pump

If the readings are fine probably electrical fault with sensor or feed to sensor
 
I want to eliminate all other possible reasons because high pressure pump is quite expensive here...
 
They told me to check the voltage on the sensor with a multimeter just in case.
Does anyone know the correct voltage?
I must take one measurement with the switch on while the engine not running and one at idle.
 
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