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V6 TDI VP44 error: injector control valve failure, pump defect?

 
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Post12-04-2005, 11:54    Subject: V6 TDI VP44 error: injector control valve failure, pump defect? Quote

Hello, I have an A4 V6 2.5 TDI (150 hp automatic) that suddenly stopped starting this morning. The car has 220,000 km on the odometer and has never been run on biodiesel. After taking the car to the workshop for a diagnostic check, the error code 'Injector control fault' appeared. According to the workshop, this error cannot be cleared. Is the fuel injection pump broken?


Translated on 18-07-2026, 22:49.
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Post12-04-2005, 12:00    Subject: V6 TDI VP44 error: injector control valve failure, pump defect? Quote

Perhaps the error code cannot be cleared because the injection system has a fault icon_rolleyes.gif.

But the pump isn't just made up of the adjuster, so I would first check the adjuster. There are standard procedures for doing this:

Ohmic resistance.

Furthermore, the actual error code would be interesting.

Okay, please provide the German text you would like me to translate into English. I will only provide the translation.
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Translated on 18-07-2026, 22:50.
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Post12-04-2005, 12:03    Subject: V6 TDI VP44 error: injector control valve failure, pump defect? Quote

Where can I find the exact procedure for checking the adjuster? Can the adjuster be repaired individually? I will look into the exact error code.


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Post12-04-2005, 12:12    Subject: V6 TDI VP44 error: injector control valve failure, pump defect? Quote

"You should be able to find that information in the usual workshop documentation."

I'm not very familiar with the VP44, but as far as I know, it also has an adjustable screw that can be removed and replaced.

Okay, please provide the German text you would like me to translate into English. I will only provide the translation.
Transparency, Teamwork
... there was another T.

I don't know what the f*ck it was.


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Post12-04-2005, 12:22    Subject: V6 TDI VP44 error: injector control valve failure, pump defect? Quote

In the usual workshop documentation - your friend should have that.

I'm not very familiar with the VP44, but as far as I know, it also has an adjustable screw that can be removed and replaced.

m;

That would be interesting... according to the workshop, they only sell that part as a complete unit again, and there's also no way to test the pump.

Can anyone confirm whether it's possible to replace the control element in a VP44 pump?


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Post12-04-2005, 13:35    Subject: V6 TDI VP44 error: injector control valve failure, pump defect? Quote

Oops.

My assumption about the term "eingeschraubt" (screwed in) referred to an exploded diagram from Bosch.

At Audi, the pump is only available as a complete unit, so unfortunately, it's not possible to replace just the regulator separately.

Sorry.
Martin.
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... there was another T.

I don't know what the f*ck it was.


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Post12-04-2005, 14:08    Subject: V6 TDI VP44 error: injector control valve failure, pump defect? Quote

Okay, the exact error code is 01268 037.

Quantity setting element N146 defective.

What options do I have now besides completely replacing the pump?


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Post12-04-2005, 15:05    Subject: V6 TDI VP44 error: injector control valve failure, pump defect? Quote

WOW!

Injection rate controllers and volume controllers are completely different things.

You can still drive with a faulty fuel injector regulator, although it's not ideal.

But if the flow meter fails, the pump will stop working.

I'm afraid "broken-new" is not an option – there's no alternative.

Okay, please provide the German text you would like me to translate into English. I will only provide the translation.
Transparency, Teamwork
... there was another T.

I don't know what the f*ck it was.


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Post12-04-2005, 15:22    Subject: V6 TDI VP44 error: injector control valve failure, pump defect? Quote

Okay, then it will probably be like that. Thank you very much for your help!


Translated on 18-07-2026, 22:56.
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