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protecon protecon is offline
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Posts: 53
Join Date: Sep 2016
Car: 2010 X5M MCB
Default 04-29-2017, 07:55 PM

If anyone throws these wastegate codes, double-check your 12V and negative feeds to the BCM. Because I'd installed a piggy-back fuse holder specifically for the JB4, the 25A fuse had blown, causing the input signal from the wastegates to be interrupted. Replace fuse and problem solved.

I've amended the fix to include checking the power & ground feed.

30CF:
30CF Wastegate, input signal
EXPLANATION: Wastegate physically unplugged.
FIX: Check green & purple wires. Check power and ground connections to BCM.

30D0:
30D0 Wastegate 2, input signal
EXPLANATION: Wastegate physically unplugged.
FIX: Check green & purple wires. Check power and ground connections to BCM.

Also took the opportunity whilst troubleshooting to relocate the JB4 and BCM inside the DME box, making the whole install a lot neater and removed 18ft of extra wire in the process.

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