Car won't keep time...CEL is on

Draab2006 · 01-04-2018, 08:09 PM

I posted this in the tuning section, but didn't have much luck getting any responses. Hoping someone might have an idea where to begin!

My 2015 M235i won't keep time...in that the time displayed in both the instrument cluster and nav screen never changes. You can set it, but it'll never advance, either in automatic mode or manual mode. Additionally, the car has thrown the codes of P15FD and P15FB, which both relate to "Engine switch-off time: Too slow during engine operation" and "Engine switch-off time: Too slow during after-run"

Would it be safe to assume that because the clock isn't 'ticking', that it's thinking the engine is 'dieseling' after shut-off, thus tripping a code?

My rationale in thinking this is that further reading about these codes indicates "The diagnostic function compares the internal timers of the DME and the instrument cluster when the ignition is switched on again while the control module is in its shutdown phase"

Could...could a simple battery disconnect kick start this damn clock??

SteveInfante · 01-04-2018, 08:16 PM

That's the first thing that I thought of after reading your post. I would try that and leave it disconnected for at least 20 minutes before hooking it back up. After you get it back together then try and set everything again, drive it, and then see if the codes come back.

Draab2006 · 01-04-2018, 08:25 PM

Glad to see I'm not the only one who thought that...I will do that and report back. My web searches hadn't yielded many results about these codes in particular, so if I can solve this hopefully it'll help someone else in the future. Thanks!

Draab2006 · 01-06-2018, 12:03 PM

Yep...disconnecting the battery for 20 minutes fixed the issue. What a strange anomaly; glad it was simple! Hope this helps someone else in the future.

SteveInfante · 01-06-2018, 03:06 PM

Quote:

Originally Posted by Draab2006

Yep...disconnecting the battery for 20 minutes fixed the issue. What a strange anomaly; glad it was simple! Hope this helps someone else in the future.

I'm glad that worked for you. Now we know....

xantdieselx · 01-06-2018, 08:14 PM

Quote:

Originally Posted by Draab2006

Yep...disconnecting the battery for 20 minutes fixed the issue. What a strange anomaly; glad it was simple! Hope this helps someone else in the future.

That's a happy ending. Glad it worked out for you OP.

Dimundz · 12-21-2019, 02:08 PM

Hello Draab2006

I have the same code P15FB on my '14 328i xdrive - External Engine Off Timer Incrementation Too Slow During Engine Running

My clock is also frozen.

My car was coded in 2015. Has yours been coded?

I am going to try and disconnect the battery for 20 min and see what happens.

Dimundz · 12-21-2019, 09:20 PM

Disconnecting battery for 20 minutes seems to have fixed the problem.

CEL did not come back on after driving for 1 hour.

Clock is keeping time again. Fingers crossed car doesn't blow up.

BetweenTheWheels · 12-22-2019, 08:42 PM

Just stumbled on this and what a big help! I had my car running on battery during testing of new retrofitted lights and afterward it has not kept time - every after two resets. I'll have to try the tactic of disconnecting the battery to see if that solves my issue.

Thanks for posting!

AndDown · 12-22-2019, 10:27 PM

Quote:

Originally Posted by Dimundz

Disconnecting battery for 20 minutes seems to have fixed the problem.

CEL did not come back on after driving for 1 hour.

Clock is keeping time again. Fingers crossed car doesn't blow up.

Our cars are computers on wheels - similar to re-booting a computer solves the problem! Good to know, thanks!

01-04-2018, 08:09 PM	#1
Draab2006 New Member 7 Rep 28 Posts Drives: M235i Join Date: Dec 2017 Location: Lebanon, IL iTrader: (0)	Car won't keep time...CEL is on I posted this in the tuning section, but didn't have much luck getting any responses. Hoping someone might have an idea where to begin! My 2015 M235i won't keep time...in that the time displayed in both the instrument cluster and nav screen never changes. You can set it, but it'll never advance, either in automatic mode or manual mode. Additionally, the car has thrown the codes of P15FD and P15FB, which both relate to "Engine switch-off time: Too slow during engine operation" and "Engine switch-off time: Too slow during after-run" Would it be safe to assume that because the clock isn't 'ticking', that it's thinking the engine is 'dieseling' after shut-off, thus tripping a code? My rationale in thinking this is that further reading about these codes indicates "The diagnostic function compares the internal timers of the DME and the instrument cluster when the ignition is switched on again while the control module is in its shutdown phase" Could...could a simple battery disconnect kick start this damn clock?? __________________ 2017 ///M2 Long Beach Blue M6 Last edited by Draab2006; 01-04-2018 at 08:29 PM.. Reason: Poor formatting
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01-04-2018, 08:16 PM	#2
SteveInfante NewFinishColumbia/detailer 604 Rep 2,096 Posts Drives: 2015 F31 xDrive Join Date: Sep 2010 Location: Columbia, SC iTrader: (0)	That's the first thing that I thought of after reading your post. I would try that and leave it disconnected for at least 20 minutes before hooking it back up. After you get it back together then try and set everything again, drive it, and then see if the codes come back. __________________ 328 F31 xDrive/OSM/Venetian Luxury Line/Cold Weather/Premium/Driving Assist/Nav/Tech "Golden Goose" 78' Honda CB400A project http://www.instagram.com/steve_inf31
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01-04-2018, 08:25 PM	#3
Draab2006 New Member 7 Rep 28 Posts Drives: M235i Join Date: Dec 2017 Location: Lebanon, IL iTrader: (0)	Glad to see I'm not the only one who thought that...I will do that and report back. My web searches hadn't yielded many results about these codes in particular, so if I can solve this hopefully it'll help someone else in the future. Thanks! __________________ 2017 ///M2 Long Beach Blue M6
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01-06-2018, 12:03 PM	#4
Draab2006 New Member 7 Rep 28 Posts Drives: M235i Join Date: Dec 2017 Location: Lebanon, IL iTrader: (0)	Yep...disconnecting the battery for 20 minutes fixed the issue. What a strange anomaly; glad it was simple! Hope this helps someone else in the future. __________________ 2017 ///M2 Long Beach Blue M6
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12-21-2019, 02:08 PM	#7
Dimundz New Member 2 Rep 14 Posts Drives: 18 X3 M40i & 14 328i xdrive Join Date: Oct 2015 Location: Toronto iTrader: (0)	Hello Draab2006 I have the same code P15FB on my '14 328i xdrive - External Engine Off Timer Incrementation Too Slow During Engine Running My clock is also frozen. My car was coded in 2015. Has yours been coded? I am going to try and disconnect the battery for 20 min and see what happens. Last edited by Dimundz; 12-21-2019 at 03:37 PM..
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12-21-2019, 09:20 PM	#8
Dimundz New Member 2 Rep 14 Posts Drives: 18 X3 M40i & 14 328i xdrive Join Date: Oct 2015 Location: Toronto iTrader: (0)	Disconnecting battery for 20 minutes seems to have fixed the problem. CEL did not come back on after driving for 1 hour. Clock is keeping time again. Fingers crossed car doesn't blow up.
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12-22-2019, 08:42 PM	#9
BetweenTheWheels Private 81 Rep 86 Posts Drives: 228i M Sport Join Date: Nov 2019 Location: Virginia USA iTrader: (0)	Just stumbled on this and what a big help! I had my car running on battery during testing of new retrofitted lights and afterward it has not kept time - every after two resets. I'll have to try the tactic of disconnecting the battery to see if that solves my issue. Thanks for posting! __________________ Current: 228i M Sport Former: E85 Z4 3.0, E89 Z4 35is, 28 others....
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