Need help with fault codes mk 5 golf TDI

[Mac23]

Looking for some help with an intermittent issue.

For a few days now my car has been intermittently failing to start.
It is a mk 5 Golf 2006 2.0 TDI

Battery been replaced, new glow plugs and new ignition switch, but
Still getting 2 codes.

Sometimes it starts fine all day then other days it only starts when it wants too.

When it doesnt start it sounds like its trying, it cranks very slow until it stop cranking and i get zero noise when i turn the key.

I will attach 2 photos of the codes i'm getting.

Any help will be appreciated...driving me crazy!

[Roverfan]

If its cranking but cranking slow whenever it doesn't start and assuming the leads are in good condition I'd say battery. The cause is either a battery drain, or the starter itself. Its highly likely the new battery has been damaged to some extent by these non starts.
If you have any aftermarket electrics in the car one of them is very likely to be the cause

[koon]

yes ,i think there is aparasitic drain on the battery. what you can do is remove the battery and connect to a charger overnight to obtain 100% charge.
with an electrical tester or ideally a multimeter you can check for excessive current drain afterwards.Like Roverfan mentioned it could be also the starter
motor playing up .

[Mac23]

yes ,i think there is aparasitic drain on the battery. what you can do is remove the battery and connect to a charger overnight to obtain 100% charge.
with an electrical tester or ideally a multimeter you can check for excessive current drain afterwards.Like Roverfan mentioned it could be also the starter
motor playing up .

Thanks guys for the quick replies. I have a multi meter so will test for parasitic draw. Fingers crossed