My Zafira 2.2 (Z22YH Enginge) 05 plate Petrol went into limp mode and the amber spanner light came on. The RAC diagnosed a code P1191 Low Pressure Fuel input Sensor. My local garage have had it for 13 days now and still have not been able to diagnose the problem. When I called in to check on progress the Exhaust Emission light had come on and the garage told me it is misfiring on cylinder 3. They are not sure what the problem is. They gave me it back saying the problem had cleared and that they had test driven it and it was ok. However when you drive it and take it up to 5000rpm it stutters and goes back into limp mode.
In 2009 a new Siemens Fuel Pump was fitted, which I now understand are the defective pumps and continental have replaced them. Vauxhall have told me that via a silent recall my Zafira had a new fuel pressure regulator fitted in 2010.
Today I have had it on the Od Com diagnostic kit and it is showing error code P1191-5a Fuel Rail Pressure Sensor Low Input. Also the fuel pressure in the Fuel Pressure Rail is 380kpa which I believe is poor it should be 600kpa.
Do I need to replace the fuel pump or is this something like an electrical wiring fault?
Any help is appreciated.
Mike
In 2009 a new Siemens Fuel Pump was fitted, which I now understand are the defective pumps and continental have replaced them. Vauxhall have told me that via a silent recall my Zafira had a new fuel pressure regulator fitted in 2010.
Today I have had it on the Od Com diagnostic kit and it is showing error code P1191-5a Fuel Rail Pressure Sensor Low Input. Also the fuel pressure in the Fuel Pressure Rail is 380kpa which I believe is poor it should be 600kpa.
Do I need to replace the fuel pump or is this something like an electrical wiring fault?
Any help is appreciated.
Mike