New battery and alternator, van won't start

[Deak22]

After I limped it home I tried to see if it would restart and it was cranking and not firing then... So Im no further along really. The new alternator I put on was just my old one that was reconditioned by a local firm. I'm alright with spanners but a spanner with tech. I'll get someone out

 

[Dundee_Kev]

Have you checked the basics like all fuses, earth's etc.

 

[Deak22]

Yeah gone through the fuses including the ones under the battery, all look good (to me lol)

 

[Deak22]

It's got a leisure battery fitted, seen something about a hard reset and disconnecting it.... Might give that a go...

 

[mmi]

Just to add 2019 t6.1

Which one - 2019 or T6.1, can't have both.
Which engine exactly - engine code please - something like CXGA, CXGB, CXHA,....

P056200 system voltage engine fault

Is this a current fault or just a thing of the past. Does it clear? Does it come back?

Can't comment in obd11 for reading the engine computer data?

@mmi any joy with obd11?

Yes, it can be of some help. All ECU data is available - when you know whar to look for. However VCDS would save A LOT of time, and probably money, too.

If the fault P0562 has been cleared/resolved:

OBDeleven > Contorl Units > Engine > Live data​

1) Check camshaft timing offset > Camshaft adaptation intake bank 1, phase position​

2) Verify fuel pressure build up when cranking > Fuel pressure​

3) Verify the ECU fires the injectors when cranking > Main injection, duration of activation​

Post in thread 'Start problem vw t6 CXHA'

1 Sep 2025

Here is the file, hope i did it right... thank you

Perfect

The issue is fuel pressure - it takes two seconds before it even starts to climb. But still remains too low. I would say the prime suspect is high pressure fuel pump (HPFP) - possibly broken spring?



For reference normal behaviour below - fuel pressure climbs immediately with engine starting to crank

• mmi

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[Dellmassive]

Awesome...

@Deak22 as above.....

 

[Deak22]

?

Sorry my bad 69 plate t6.1

 

[Deak22]

come

Comes back