Why is my clock being reset? Related to code A0B4?

Dekdo · 01-16-2020, 12:58 PM

Car seems to start just fine, runs great. Sometimes the clock resets... sometimes is doesn’t.

I took a 5 hour drive this past weekend and didn’t see it reset at all, but getting back to my daily commute(hour each way) I’ve seen it reset a couple times the past two days.

As an FYI.. have a MHD stage 2+ tune on the car. I plugged in my Carly adapter today that just arrived and it’s showing me the A0B4 code.

JM98 · 01-16-2020, 11:09 PM

It usually resets if you have a weak battery or a power draw from an accessory such as leaving an OBD cable plugged in

chris_flies · 01-16-2020, 11:12 PM

Weak battery; car has a low voltage cutoff of sorts.

Dekdo · 01-17-2020, 12:57 PM

Damn, I’ve gotta imagine a USB charger left In the cigarette lighter is not the cause..

Will be looking into a new battery.

01-16-2020, 12:58 PM	#1
Dekdo Private 10 Rep 78 Posts Drives: BMW 135i Join Date: Dec 2019 Location: Chicago iTrader: (0)	Why is my clock being reset? Related to code A0B4? Car seems to start just fine, runs great. Sometimes the clock resets... sometimes is doesn’t. I took a 5 hour drive this past weekend and didn’t see it reset at all, but getting back to my daily commute(hour each way) I’ve seen it reset a couple times the past two days. As an FYI.. have a MHD stage 2+ tune on the car. I plugged in my Carly adapter today that just arrived and it’s showing me the A0B4 code.
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01-16-2020, 11:09 PM	#2
JM98 Lieutenant 391 Rep 532 Posts Drives: 2009 135i Join Date: May 2016 Location: SoCal iTrader: (0)	It usually resets if you have a weak battery or a power draw from an accessory such as leaving an OBD cable plugged in
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01-16-2020, 11:12 PM	#3
chris_flies Sideways and Smiling 3027 Rep 2,860 Posts Drives: In Exuberance Join Date: Mar 2017 Location: Rosamond, CA USA iTrader: (0) Garage List 2012 BMW E91 328i [0.00]	Weak battery; car has a low voltage cutoff of sorts. __________________ 2012 BMW 328i 6-Speed Wagon \| Deep Sea Blue with Grey Dakota Leather \| Manual Swap, 330i Intake + Tune, 3.15 Helical LSD, Öhlins R&T (SOLD) 2009 BMW 128i 6-Speed Coupé \| Monaco Blue with Black Sensatec \| chris_flies' 128i thread
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01-17-2020, 12:57 PM	#4
Dekdo Private 10 Rep 78 Posts Drives: BMW 135i Join Date: Dec 2019 Location: Chicago iTrader: (0)	Damn, I’ve gotta imagine a USB charger left In the cigarette lighter is not the cause.. Will be looking into a new battery. Last edited by Dekdo; 01-17-2020 at 01:38 PM..
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