Passat CBAB Error: High-Pressure Pump Replacement?

Hi everyone,
Our piece of junk software is acting up again.
It received a new high-pressure pump 18 months ago and is now sporadically throwing errors.

The numbers 004197 and 000136 bother me the most.
I attribute the majority of the issue to undervoltage caused by winter conditions and operation in a short-haul mode.

Where do I start?

Hi,

I would like to use a

Quote:

high-pressure generator B10AE 14 [008] - Short circuit to ground/ground fault. Fuel system (bank 1) rail/system pressure too high

starting.

Since the error scan shows a high-pressure reading in addition to the pressure regulation difference, you can likely be quite confident about the high-pressure pump. If the high-pressure pump is worn out, it won't be able to build up the necessary pressure in the fuel rail.

Therefore, I suspect that the fuel pressure regulator problems are caused by the fuel pressure sender and/or the pressure control valve. Also, carefully check their associated wiring and connectors.

Best regards, Rainer.

The climate story is ultimately secondary.

Regarding the diesel pressure, I'm suspecting the pressure sensor.
(because it is the more cost-effective solution)

Is the M18x1.5 pressure sensor, part number #03L 906 054A, the correct one?

Quote:

Is the M18x1.5 pressure sensor #03L 906 054A the correct one?

I have no idea; the VAG part number should also be found on the sensor itself.

Climate stuff: I scrolled too far down while trying to find the text to copy, so it was edited. Nevertheless, a faulty high-pressure pump is an unrealistic cause for excessively high rail pressure.

What exactly was the cause of the failure in the last high-pressure pump, and was the injection system cleaned or completely replaced (due to debris)?

Best regards, Rainer.

It was cleaned, but I didn't do it myself; I took it to the dealer.
It was only idling. Apparently, it was completely worn out with a near-zero boost pressure.

Let's see what the new sensor does.