Ton Of Problems, Please someone help!

[rtk8892]

Hello, I am starting a new thread on this. Pretty much my b6 s4 is having a ton of issues out of no where.

I was driving home the other day and my oil pressure light came on and the car started driving really weird. The clutch pedal was vibrating pretty bad when pushed in and only when pushed in. Also if i was accelerating, as soon as i let off the gas pedal the car would jerk real hard. It is now parked in the driveway until i can get to the bottom of this.

When i go to start the car, it runs for a second then immediatly shuts off so I scanned it with Vagcom with my foxwell and Its throwing a bunchhhh of codes that werent there before. Here is a list of all the codes...

01-ENGINE

18010 Power Supply Terminal 30: Voltage too Low : P1602- Static - No Fault Type Identified

18048 Internal Contr. Module (EEPROM) Error: P1640

16524 Oxygen (Lambda) Sensor B1 S2: No Activity : P0140

18044 Powertrain Data Bus: Missing Message from Airbag Controller : P1636

18036 Powertrain Data Bus: Missing Message from Steering Angle Sensor : P1628

18057 Powertrain Data Bus: Missing Message From ABS Controller : P1649

18107 Powertrain Data Bus: Missing Message from Steering Wheel Electronics : P1699

18043 Powertrain Data Bus: Missing Message from A/C Controller : P1635

18058 Powertrain Data Bus: Missing Message from Instrument Cluster : P1650

16885 Vehicle Speed Sensor Implausible Signal : P0501

17978 Engine Start Blocked by Immobilizer : P1570

03- ABS BRAKES

18262 Powertrain Data Bus: Hardware Malfunction : P1854 Intermittent

18031 Powertrain Data Bus: No Communication : P1623 - Static - No Indication on Display

00778 Steering Angle Sensor (G85) - Static - Implausible Signal


08- Auto HVAC

01312 Powertrain Data Bus - static- Interrogate fault memory

09-Cent. Elect.

01312 Powertrain Data Bus - static - Interrogate fault memory

01326 Control Module for Multi-Function Steering Wheel (J453) - sporadic - No Communication


0F- Digital Radio

02635 Tuner Not Enabled Activated - static - No Indication on Display

15-Airbags

01312 Powertrain Data Bus

00474 Control Module for Immobilizer - static - Interruption

00532 Supply Voltage B+ - static - No fault type identified

17 Instruments

01314 Engine Control Module - sporadic - No communication

01316 ABS Control Module - sporadic - No communication

01312 Powertrain Data Bus - sporadic - Defective

25 Immobilizer

01314 Engine Control Module - sporadic - No communication

01316 ABS Control Module - sporadic - No communication

01312 Powertrain Data Bus - sporadic - Defective

46 Central Conv.

01134 Alarm Horn (H12) - static - No communication

00955 Key 1 - Intermittent

55 Xenon Range

00532 Supply Voltage B+ - sporadic - Signal too low


Anyone have any clue what the issue could be?

[Ob3R]

Wow, never seen that before...
Maybe something to do with ECU? Water or bad harness is short circuiting the ECU and therefore thats why you have codes for most if not all modules?
Again just a guess. I would open up the ecu box and see if theres anything wrong in there.

Sent from my .:R32

[jakeoboy67]

get the multimeter out !
good luck!
(start by the basic stuff)

[rtk8892]

I had the ecu out, everything looks good. I need to grab a multimeter today. What should I be checking with it and how

[rtk8892]

Anyone?

[924Carrera]

I'm not much of an electrical expert but it seems like insufficient voltage to the ECU is causing issues. You really need the wiring diagrams (included in the Bentley guide) so you can check voltages at the pins that supply the ECU, at least as a start.

[bmwpower603]

Bentley manual seems like a must with this vehicle. Hopefully when my engine is back in, I don't get to many codes! !! But I expect some after doing an engine pull.

OP: I'd bring that to a dealer TBH.

Sent from my SM-G900T using Audizine mobile app

[badger.]

that many different codes/no communicates generally indicates a bad battery (voltage too low) or a missing ground or power wire. something big is disconnected/shorted somewhere

[jakeoboy67]

Hopefully when my engine is back in, I don't get to many codes! !! But I expect some after doing an engine pull.



Sent from my SM-G900T using Audizine mobile app

I was expecting lots of codes too when I restarted my car after doing the timing in it , but the only codes I had were SAI related (deleted everything).

just make sure you plug every connector back in, and make sure they all "click", lol

and my throttle was all over the place somehow (stalled when I gave it gas/weird behavior)
. . . had to do a quick throttle body alignment and it was fine after.

[Concavitor]

Battery going dead - voltage drop. That's all. Happened to me. Get this battery at AutoZone:

http://www.autozone.com/batteries-st...?checkfit=true

[rtk8892]

I was thinking this the other day, but have kinda let go of the idea. Thank you very much!

[rtk8892]

I got the battery tested this morning at advance auto and it came up good, but low on voltage. Fuck meeeee idk what it could be

[924Carrera]

The battery tested low on voltage? Replace it and see where you're at. A lot of this power supply stuff is pretty much straight off the battery. If the supply voltage is low, it's a very good chance the battery is the culprit.

[rtk8892]

I let advance slow charge the battery for 5 hours today, got it back at 12.6v 866cca. I put it in the car, the immobilizer still kept it from starting, and I checked with the multimeter it went back down to 12.2. I just want to be sure before I buy the battery