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A3 2.0 tdi Sportback 2008 power loss


Dru152
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Hi

I recently noticed a whistle like sound coming from my engine and power loss on the motorway which prevented me from travelling over 70mph. My car would also struggle if there was a slight Incline while on the motorway and the speed would drop.

Also, the engine emissions light came up on the dash board.

I took the car to the garage and had the turbo replaced but the power loss issue remains.

I purchased a diagnostic tool and found no error codes when I connected it to my car.

Any ideas or advice would be much appreciated.

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The whistle sound has gone after I had the turbo replaced but the power loss is still there.

Drove into work this morning and as soon as I go over 60mph I notice a loss in power and the car doesn't seem to accelerate with any power.. Seems lifeless and just edges higher slowly.

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It could be something to do with fuel delivery...

 

Check the fuel filter, fuel relay, fuel pump, injectors. Probably start with the fuel filter as that's easiest

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It could be something to do with fuel delivery...

 

Check the fuel filter, fuel relay, fuel pump, injectors. Probably start with the fuel filter as that's easiest

Thanks James, I will give that a go.

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Forgot to add this:

 

Also, the engine emissions light came up on the dash board and the following codes came up when I scanned it:


00665

01025

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00665 - Boost Pressure Regulation: Control Range Not Reached

 

Possible Causes:
 - Hoses/Pipes no fitted correctly, disconnected or leaking 
 - Charger Pressure Control defective 
 - Faulty turbo (hopefully you can ignore this one but you never know) 
 - Faulty Diverter Valve
 
 Possible fixes: 
 - Check all hoses and pipes are connected correctly
 - Check/replace/clean Charge Pressure Control 
 - Check Turbo again 
 - Check Diverter Valve 

 

00125 - Trigger for On Board Diagnostic Lamp; Malfunction 

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