My vehicle is starting but not working

Hello everyone, I just joined you. My 307 1.6 hdi Premium model vehicle sometimes does not work when I start but when I start the gas before starting the starter, the starter starts and the car starts. What could be the reason? Thank you in advance for your help.

the problem is on the battery

Thank you, Gökhan Bey. It has been 4 years since we did not change the battery. Have a nice day

If the key is not original, it could not read the immo if it was made later. Give it a try with a spare key.

The key is original, but experience with another key. Thank you Oğuzhan Bey. Have a nice day..

Hello friends, I measured the battery values last week about the vehicle not working from time to time, it turned out normal. Then I got the car connected to the computer and gave the fault code P0341. Eccentric shaft sensor malfunction. We changed the sensor and kept 100 TL. May Allah not test anyone with the stress of staying on the road :)