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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > DSC Malfunction need help please



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      03-21-2019, 10:34 PM   #1
aLbe
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DSC Malfunction need help please

Hi, i recently replaced Serpentine Belt, Tensioner, pulley, oil cooler gasket and coolant flush. while i was bleeding the coolant it was shooting out from the bleeder gap for 10 minutes straight non stop i had to put a rag on top of the cap and it was draining down onto my vacuum line/ 2 vacuum box i don't know what this box is called it has 3 vacuum line going into each box its located on the right side of the coolant reservoir near the bottom of the injector , coolant was getting all over my engine( valve cover off) i had to stop the bleeding process because my 7 liter oil pan catcher was getting full. after i empty my oil pan catcher i redid the bleeding but this time the pump turn on and off not contanly on like before. After the bleeding i hose my engine off with water.i start the car at idle for about two minutes, then I started revving it and the first few light revs were fine. It came back to idle just fine with no indication of any problems. Then, I opened up the throttle and heard a pop. The car went into reduced power with DSC faults and threw codes. The revs just bounced from 1000-1500 rpms.

P1638 Throttle Valve Position Control; Throttle Stuck Temporarily
P1633 Throttle Valve Adaptation; Limp Home Position
P1639 Throttle Valve Position Control; Throttle Stuck Permanently

Also i heard a small hiss/whine coming from the vacuum box after i turn off the car but it went away few mins later, the passenger side sensor from the wheel well(in a black box) got soak from the coolant/water.

Thank you
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      03-22-2019, 02:25 PM   #2
MysticRob
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Not sure what kind of coolant flush process you used, but I don't recall anything about coolant shooting out everywhere in the how-to videos I watched.

Let the car dry, remove the battery leads to kill power to all modules for a couple hours, check fuses in the meantime, then put it all back together and let us know how it goes.

Unfortunately it could be worse than simply drying things out.
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      03-27-2019, 05:26 PM   #3
aLbe
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Fix the problem, my charger pipe gasket got stuck between the throttle body gate
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