Airfan

Hey guys, I will need some help. I had very strange situation today. I was stopped to make a left turn waiting for the traffic. The Start/Stop system initiated and stopped the engine. I saw an opportunity to make the turn so just before it came I've released the brakes and pushed the gas pedal while the engine was starting. The car accelerated and less than a second after that the steering became faulty and very very hard to turn (no power steering). Somehow I 've managed to turn the steering wheel enough not to hit the sidewalk.
Now I have 3 errors showing on the dashboard:
Steering: faulty;
Start/Stop system: fault. Function unavailable. Please contact workshop;
Audi pre sense: currently restricted

I've checked the fuses but didn't seem to have any faulty fuses. I didn't find power steering fuse in the manual.
I've checked for errors with OBDEleven and got these:
Lane change assist left: U112300
Lane change assist right: U112300
Steer assistant: B200000

It is not possible to be erased.
I've called Audi but the closest possible time is in the middle of the next week. I need the car so if this is fuse/adaptation related I can find a way to do it.
Car is 2018 Audi A4 B9 2.0T Quattro 252hp
Any thoughts?

Airfan

Friday,26,June,2020,10:48:47:47654
VCDS Version: Release 20.4.1 Running on Windows 10 x64
www.Ross-Tech.com

Address 44: Steering Assist Labels: NONE
Control Module Part Number: 8W0 909 144 H HW: 8W0 909 144 B
Component and/or Version: EPS_MLBEVO_ZF H08 0410
Software Coding: 09000380008000
Work Shop Code: WSC 06324 790 00001
ASAM Dataset: EV_EPSZFAU49X 003023 (AU49)
ROD: EV_EPSZFAU49X_003.rod
VCID: 4205B7E651B16B0AD9-8016
1 Fault Found:

12800 - Internal Control Module Memory Check Sum Error
B2000 00 [009] - -
Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 4
Fault Frequency: 1
Mileage: 17217 km
Date: 2020.06.25
Time: 16:52:26

Expanded ambient data 1-Engine running: Engine_Running_Stable
Expanded ambient data 1-Supply voltage: 0.00 V
Expanded ambient data 1-Temperature: -70 °C
Expanded ambient data 1-System status: 8
Expanded ambient data 1: 00
Expanded ambient data 1-driving_direction: 0
Expanded ambient data 1-KFA: 0
Expanded ambient data 1-KFC: 50
Expanded ambient data 1-Ready_To_Drive_Bit: 0
Expanded ambient data 1-StartStop Info: 0
Expanded ambient data 1-Steering_Angle_Calculated: 346 °
Expanded ambient data 1-Steering_Angle_Calculated_Sign: 0
Expanded ambient data 1-Steering_torque: 1.70 Nm
Expanded ambient data 1-Steering_Torque_Sign: 0
Expanded ambient data 2-Filtered_supply_voltage: 1.21 V
Expanded ambient data 2-Switched_voltage_terminal_30_unfiltered: 0.00 V
Expanded ambient data 2-Voltage_terminal_30_unfiltered: 148.05 V

JerSeattle 07

Looks like power steering issues is a known Audi A4 thing:

https://www.carproblemzoo.com/audi/a...g-problems.php

SchwarzS6

All of the comments in that link are for cars prior to the B9. The B9 is the first car to use all electric power steering. The cars in those comments are all hydraulic power steering.

Airfan

Unfortunately we are looking for power steering rack replacement.

zenkistic

https://www.hbsslaw.com/cases/audi-a...p-start-defect
(this showed up as an ad on facebook...)

Airfan

After brief discussion with Audi I finally had my power steering replaced yesterday under warranty. I am glad they have good customer service.

audi8k

Just a factual correction; The first A4 with electric power steering was the facelifted B8 (B8.5), at least in Europe. I believe it was the same in NA.