Fuel system

DDIAZ0604

MEMBER
2005 VOLKSWAGEN BEETLE
2.0L
4 CYL
FWD
131,000 MILES

Getting P0625 fault code. I have replaced the pump, filter, and relay. At first I suspected the aftermarket fuel pump so I ordered and installed a new OEM VW pump. Still having a hard time starting when cold.

Friday, August 11th, 2017 AT 9:18 PM

4 Replies

KEN L

MASTER CERTIFIED MECHANIC
47,702 POSTS

Hello,

The P0625 codes is for the alternator diode failure. To confirm the problem here is a guide that will how you how to test for AC voltage which is what the codes is telling us.

https://www.2carpros.com/articles/how-to-check-a-car-alternator

Please run this test and get back to us we are interested to see what it is.

Cheers, Ken

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Monday, August 14th, 2017 AT 2:07 PM

DDIAZ0604

MEMBER
2 POSTS

Hard to start and getting P0627 fault code. I have replaced the pump, filter, and pump relay. At first I suspected the aftermarket fuel pump so I ordered and installed a new OEM VW pump. Still having a hard time starting especially when cold.

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Monday, August 14th, 2017 AT 4:27 PM

MHPAUTOS

MECHANIC
31,937 POSTS

Check power to the pump, this can be an open circuit fault code.

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Tuesday, August 15th, 2017 AT 1:15 AM

KEN L

MASTER CERTIFIED MECHANIC
47,702 POSTS

It almost sounds like it could be the engine coolant temperature sensor. It could be off but not enough to trigger a code.

Here is its location (below)

I would try a new sensor to see what happens

Please let us know what you find.

Cheers, Ken

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