[porshapower]

Hi guys. So my parents made their trip down south Florida to visit my sister and car ran fin with no check engine. They let car sit a couple days and everyrhing goes crazy. Upon startup dsc triangle pops up on dash,check engine light,car on lift picture and long cranking to start. My sister takes them to Tires plus and they said its the crankshaft sensor. They said they changed it and it made no difference. Car drives good still so parents drove it home. Well I opened the hood and there is evidence they at least attempted to get to the sensor looking at the missing nuts from power steering reservoir etc. I will be removing intake next couple of days to see what is going on. I scanned with my genera obd scanner and have 4 codes P1727,P0458,P0335 and P116e. With my Foxwell scanner I retrieved codes under DME section of 2a19 2aa8 2aa9 2a94 2d16 2d0f 2ea1. Battery is good. Any ideas how I can be getting so many codes all of a sudden? Thank you so much in advance on your responses.

[gbalthrop]

Originally Posted by porshapower

...I scanned with my genera obd scanner and have 4 codes P1727,P0458,P0335 and P116e. With my Foxwell scanner I retrieved codes under DME section of 2a19 2aa8 2aa9 2a94 2d16 2d0f 2ea1.

Your 2008 328i has a problem in the Fuse F11 circuit that powers each of the following components:

Your Codes are for CIRCUIT issues in following components, ALL of which are powered by F11 and DME Relay K6300:
1) MAF Sensor
2) Crankshaft Position Sensor
3) Tank Vent Valve
4) DISA Actuators 1 & 2
5) Oil Condition Sensor (OZS)

The P1727 code is a Transmission Module Communication error which occurs when there is a CPS signal interruption, per this link:
https://www.autocodes.com/qa/16966/p...ible-solutions

Here is the TIS Circuit Diagram for F11 in the 2008 328i:
https://www.newtis.info/tisv2/a/en/e...1-fuse/vCFKEe3

Five for Five is MORE than a coincidence.

There is an intermittent (very brief duration) hiccup somewhere in that circuit causing loss of power to all 5 Components. Your FF Data may NOT show exactly the same mileage for ALL codes, due to different algorithms for various sensors, but I would wager that MANY of the codes are set at the SAME mileage due to the SAME power supply fault. If your FF Data includes VOLTAGE at the time the FC was set, that may further confirm what already appears obvious.

Do NOT throw parts at it, as there is ONE power supply connector or wiring fault in the F11 system that caused fault codes to be saved in the DME for ALL FIVE Components (Actually SIX -- 2 DISA Valves) on that circuit. Here are the "Installation Location" diagrams for the three connectors between the Fuse and the Sensors (X6041, X60551 & X6960), all of which are in the E-box:
https://www.newtis.info/tisv2/a/en/e90-328i-lim/SL92ADs
https://www.newtis.info/tisv2/a/en/e90-328i-lim/S8C692L

I would record ALL codes and FF Data, then CLEAR all codes, and see if any return. The ONLY thing I would do at this time is trace the F11 circuit from K6300 to X6960, and carefully inspect each connector for looseness or corrosion, cleaning the connectors with Electronic Contact Cleaner, and inspect the wiring for insulation damage. Check & clean F11 fuse spades and fuse socket as well.

Please let us know what you find,

George

[porshapower]

Thank you so much George. You were right on!! Was the fuse at the F11 location. Thanks again and I sent you a PM.

[gbalthrop]

Originally Posted by porshapower

...Was the fuse at the F11 location.

Just curious what you found as far as the condition of fuse F11 or its socket. Obviously if the car was driveable, the fuse had NOT blown, and there was just a momentary power supply loss to that circuit.

To reply to the remarks you made in the PM, troubleshooting MULTIPLE faults that occur at the same time can actually be easier than finding the cause of a single fault. The KEY is to look for a SINGLE FAILURE that explains ALL/ MOST of the multiple faults/ codes.

I don't memorize fault codes or electrical circuits. I simply know how to use Bentley (searchable pdf) & TIS to search fault codes, retrieve Fault Code Definitions, and find electrical components and their circuits in TIS schematics. The TIS schematics are amazingly easy to use & understand once you've searched for components for awhile.

The electrical circuitry is key to properly diagnosing MANY of the issues in these cars. Properly understanding Fault Code Definitions, Freeze Frame Data, and circuit diagrams for the various systems make solving seemingly-complex puzzles relatively easy. You just have to take the time to "research" the Code Definitions, and circuits for each of the Sensors or Components related to each code.

Attached to following post (so as NOT to destroy margins ;-) are "KEYS" from Bentley for the TIS schematics, explaining Symbols and Conventions, and also a pdf with LINKS to E9x References such as TIS, Bentley, Fault Code Definitions, and a lot more.

George

[gbalthrop]

"KEYS" from Bentley for the TIS schematics, explaining:

1) Symbols
2) Conventions

ALSO: a pdf with LINKS to E9x References such as TIS, Bentley, Fault Code Definitions, and a lot more.

George

[xavi718]

Originally Posted by porshapower

Thank you so much George. You were right on!! Was the fuse at the F11 location. Thanks again and I sent you a PM.

i have a 2006 330xi where is the F11 located ?

[gbalthrop]

Originally Posted by xavi718

i have a 2006 330xi where is the F11 located ?

Don't "Go around Dangerous", 'cuz a little knowledge is a dangerous thing.

Your 2006 330xi has a different fuse box layout than either OP's 2008, or my 3/2007 build 328i/xi. Fuse F11
has different locations or functions on each of the three "Groups" of E9x vehicles:
1) E9x built BEFORE 3/1/2007 had the "2006" Fuse layout & functions shown in the FIRST two attached Bentley Fuse Charts.
The "pre-3/1/2007" E9x also had ~ 5 fuses and KL87 (DME Main Relay) located in E-box under hood that later models
had on JB (Junction Box) Fuse Panel. F03 is powered by KL87 DME Main Relay (K6300 on Schematic).

Fuse F03 located in the E-box on your 2006 model has same functions as fuse F11 on 2008 & later E9x models
(built AFTER 9/1/2007). OP had 2008 model, so his F11 on JB fuse panel served same functions as your F03.
F03 Circuit for YOUR 2006 is attached as final ScreenPrint. Bentley does NOT show the Fuses F01 - F07, Located in the
E-box on certain models, on the attached fuse charts. Shown in TWO segments: 1) Top; 2) Bottom.

2) E9x models built BETWEEN 3/1/2007 & 9/1/2007 (LATE 2007 models) had the Fuse Charts shown in 3rd & 4th
attachments. NOTE different LAYOUT from "2006" chart. The fuses that have SAME function as "2006" fuses, keep
SAME fuse number, causing what appears "Random" fuse numbering instead of numerical order from Top-to-Bottom,
Left-to-Right as in other two fuse charts.

3) E9x models built AFTER 9/1/2007 (2008 & LATER), used fuse charts in 5th & 6th attachments. SAME Layout as
3/1/2007 - 8/31/2007, but numbering changed to return to numerical order, Top-Bottom, Left-Right.

So if that information does NOT solve your issue, please let us know what the issue is, and perhaps we can help.
Also, if you need more ISTA wiring diagrams, component locations or Connector views, please ask.
George