Yesterday, the car was taken to the shop for repairs. The issue, according to them, was
The throttle actuator receives an activation signal when the driver applies the brake, and this signal moves the operating linkage between the actuator and the turbo wastegate. When the operating linkage sticks and fails to operate the turbo wastegate, power is lost, and it’s conceivable that dashboard warning lights will illuminate. The working linkage has a bearing that has gotten somewhat corroded, which causes a minor amount of resistance.
The problem is resolved by restarting the throttle actuator, which releases the seized linkage, when the car’s engine is turned on and off.
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Poor Brad
I’m attempting to help a friend with a 2005 X3 2.0 L Diesel, but I could use some advice. The car starts alright, but as soon as you try to crank it, the dash flashes DDE and turns off. It idles well if you start it and leave it to run.
Before this, the guy had told me that if you pushed it hard, it would clear and have full power and then run smoothly after having low power and missing under strain.
The low pressure pump in the tank typically runs for only a few seconds when the ignition is turned on before the fuel rail or pump regulator either turns it off, which confuses me more than the high pressure pump. This is not the case; instead, I believe that the fuel is going to the HP Pump and then returning to the tank, not actually providing adequate pressure to the HP pump, because the pump can be heard operating continuously with the ignition on and not in start mode. Now, is this possible if the high pressure pump is broken? Can it bypass again and return to the tank?
The car is standing and would need to be towed to me so that I could inspect it fully. There is also a low pressure pump at the fuel filter. Any assistance is greatly appreciated.
Toby Stack
I believe a failing supply pump would not cause it to stall since, once started, the high pressure pump would likely drag the diesel through. Instead, I believe it is likely the high pressure pump, injectors, and/or wiring. Numerous vehicles with failed under-seat or in-tank pumps that were still operating as the high pressure pump forced diesel through them.
Kief
I therefore receive an email from my SA stating that the Digital Diesel Electronics are currently being replaced (DDE).
To cut a long tale short, this past weekend I observed on iDrive that the “Engine Oil was Too High.” I physically checked with the dispstick and it was just a little bit higher. While at the dealer, the oil level was adjusted, but the car’s iDrive warning was still present. The oil sensor was replaced, but the error notice persisted. The DDE will now be replaced in accordance with PUMA.
The car is 2.4 years old with 21K miles, and other than recalls, has been great. I’m now a little concerned that Pandora’s Box has been opened and I’ll end up with excessive battery drain or other electronic gremlins. The car has been at the dealer since Monday. I’m sorry Ard:angel, but how concerned should I be that the DDE is being replaced?