After driving above 80-90kmph my car suddenly stops and coil light start blinking. After switching key off and on again car start and light goes away. Checked and cleaned injectors they are okk. Wiring and connectors are ok. Scanning shoes fault code" P2147 Fuel Injector Group A Circuit Low " shows.

Whenever i drive the car and reach a speed of 80/hr the speedo meter gets to 0 with a beep sound and all the lights of meter pops up and rpm doesn't go above 2000 rpm. After this problem coming i have done all major service like timing belt ,pulleys, filters, oil etc still the problem is same and more of now when i turned on the ignition abs and coil lights pop up continuously after the service...

The oil light indicator turns on. I've taken it twice to the agency. The first time, I was told that the vehicle was mechanically perfect and that it might be a failure in the sensor plug. The problem persisted so I returned ten days later, left the car a whole day there and they are now telling me that the problem is solved, but the light keeps turning on.

When taking uphill or downhill roads at 2000-2500 rpm, the lubrication light and alarm turn on. I've already changed the oil pump, but the problem remains. They only turn off if I suddenly accelerate hardly at more than 2500 rpm. The oil and filters are new. What might be the failure if the scanner does not indicate anything?