T L

Hi, my 2013 S4 is having trouble starting and I need some guidance. I have a good battery but something is draining it. I'm able to jump start it and it will run fine for another Month then not start again. Here's the fault codes i'm getting.

CAN network gateway:
02256 - Quiescent current
03041 - Energy Management Active
01315 - Transmission Control Module (TCM)
00532 - Supply Voltage B+

Ignition authorization:
01330 - Central Control Module for Central Convenience (J393)
02812 - Steering Column Lock, supply voltage terminal 30
00446 - Function Limitation due to Under-Voltage

Central electronics:
01315 - Transmission Control Module (TCM)
00446 - Function Limitation due to Under-Voltage
00532 - Supply Voltage B+

Body/convenience system:
01315 - Transmission Control Module (TCM)
00532 - Supply Voltage B+

Driver's door:
00532 - Supply Voltage B+

Front passenger's door:
00532 - Supply Voltage B+

Rear left door:
00532 - Supply Voltage B+

Rear right door:
00532 - Supply Voltage B+

Driver's seat:
00532 - Supply Voltage B+
00446 - Function Limitation due to Under-Voltage

Heater & air conditioning:
00532 - Supply Voltage B+

Steering wheel:
00446 - Function Limitation due to Under-Voltage
00532 - Supply Voltage B+

Back-up camera:
00446 - Function Limitation due to Under-Voltage
00532 - Supply Voltage B+

Instrument cluster:
00532 - Supply Voltage B+

Parking brake:
10554390
329728
329984

ABS:
01315 - Transmission Control Module (TCM)
00473 - Control Module for Electric Park- / Hand Brake (J540)
01324 - Control Module for All Wheel Drive (J492)
00446 - Function Limitation due to Under-Voltage
00532 - Supply Voltage B+

Airbags:
13635840
9483264

Lane-change system:
114178
136194
731394

Radio:
00532 - Supply Voltage B+
00446 - Function Limitation due to Under-Voltage

Sound system:
00532 - Supply Voltage B+

Infotainment system:
03276 - Testing Management Software version
00532 - Supply Voltage B+
03367 - Supply Voltage Display Unit

Power steering:
18689 - Secondary Air Injection System Control 'A', Circuit Low

Structure-borne sound:
00002 - Transmission Control Unit
00004
00005
1179648

Evan's Santorin S4

What makes you think you have a good battery?

T L

Hi Evan, I took it into an Audi Dealership today thinking it might be a battery problem. They did some testing and the battery is fine. The next step was they want me to come back for a 350 dollar voltage test. I recently installed a valved exhaust that uses the battery and a dash cam as well.

Evan's Santorin S4

I'd suspect the dash cam install if it has a standby mode. Do you have a VOM? If not, take it to an indy shop for diagnostics.

tommywithaR

You probably know but are battery's have to be coded. If you don't know this it's going to sound crazy. So there is a bunch of different volt and amp battery's. That can go in our cars. So the car don't over charge and possibly cause a fire. You have to tell the car what battery if you don't. It will not charge it anywhere near full. If you have a friend witb a laptop that has the audi softwhere or any indy shop. But if you have a hardwired dashcam. That could be a drain and kill you batt also. I would not worry about any of the codes. To make sure there all just misreading due to low voltage. You could get the car running, clear codes , run for a while , check for codes. There won't be any idea bet doilers against door nails . Turning it off and back on befor the battery dies. But I'm pretty sure that between the 2 your going to find you problem. Good luck