Skoda Octavia fail to start

Check crank sensor but usually shows when scanned if faulty , check compressions .

thanks for your response. i will check it. one observation, as soon i switch on the ignition, but not starting the engine, the radiator fans are started rotating all the time. the temperature gauges in the dashboard is always showing up high. if i remove the electrical connection of both coolant temperature sensor (one on radiator line and one near the left air charge hose on the coolant line near the crank head. i remove both sensor and checked the resistance, it gives very low value 1.4 m ohm. but ROSS tech scanner is not showing anything error. its a UDS ECM and test are limited. what is option to check the compression using the scanner?

Those sensors / engine coolant temp sensor are needed to be working as they supply the ECU with the info required to set fuel , timing parameters etc. Yours appear to be knackered with the fans running and temp gauge reading.

Sir - the sensors are not seems to be a problem, i replaced with new one and the same issue. the radiator fan is still running when i switch on the ignition but car is not started.

the temperature level in the dashboard is going to red side.

how do i check the compression with VCDS? which options in engine module, this is a UDS protocol and lot of options are missing.

thanks in advance for your response.

Dear Sri - i was away for while due to various medical reason, i just back and checked the complete car mechanical part, circuits etc. the car is still not starting and when i checked the compression its perfect, the fuel from the fuel tank and the electrical pump are perfect. but the fuel is not coming out from the high pressure pump. i removed the metering devices and tried to check whether the signals are comping in the metering device by cranking, the car is started that means when I remove the metering device and not connected to the HPP the car is starting. do you have any idea why is this sir? please help

Checked the fuses in engine compartment and fuse box inside the car ?