[Biturbos4] Help with a few fault codes
steven at juniper.net
Thu Mar 3 13:47:53 EST 2005
Quincy Chiang writes:
> 17965 - Charge Pressure Control: Positive Deviation
> P1557 - 35 - 10 --- Intermittent
>From the research I did, there are many possible causes. You should
probably do a visual inspection of the TBB, BPVs, and IC hoses. It
seems that tears in the TBB or IC hoses can cause this DTC, as well as
a stuck BPV. A pressure-test of the intake can help find leaks.
There are instructions on audiworld.com to build one from Home Depot
parts, or you can buy the kit from awe-tuning.com.
A bad N75 valve or stuck turbo wastegate were also mentioned as
possible causes. Even a bad MAF has been blamed.
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