IBS Sensor issue

Kembaallstar · 11-03-2020, 03:51 PM

I just replaced my ibs because I was getting the code 2E8E-Intelligent Battery Sensor Missing and battery would drain out. I cleared the codes before replacing it. After replacing the ibs I scanned the car again. Same code pops up. I also tried switching the two blue connectors from the old ibs to the new ibs. Still shows same the code. I think it the problem might be the power distribution box on the battery, since its easy to mess up. Any ideas whats wrong?

relative4 · 11-03-2020, 04:33 PM

The BSD has 4 consumers - IBS, alternator, WP, oil level sensor. A problem with one can knock out out any or all of the others.
Since a missing/bad IBS will not drain the battery, take a look at your alternator. What is your voltage at idle?

Kembaallstar · 11-03-2020, 04:52 PM

Quote:

Originally Posted by relative4

The BSD has 4 consumers - IBS, alternator, WP, oil level sensor. A problem with one can knock out out any or all of the others.
Since a missing/bad IBS will not drain the battery, take a look at your alternator. What is your voltage at idle?

Quote:

Originally Posted by relative4

The BSD has 4 consumers - IBS, alternator, WP, oil level sensor. A problem with one can knock out out any or all of the others.
Since a missing/bad IBS will not drain the battery, take a look at your alternator. What is your voltage at idle?

I idle at around 13.7. I had the battery recently checked. The car will start one day and the next it won't even crank

Tunafish · 11-03-2020, 04:59 PM

Just have a bad connection you have to trace.

Kembaallstar · 11-03-2020, 05:06 PM

Quote:

Originally Posted by Tunafish

Just have a bad connection you have to trace.

Quote:

Originally Posted by Tunafish

Just have a bad connection you have to trace.

Should I start with the battery connections?

gbalthrop · 11-03-2020, 05:39 PM

Quote:

Originally Posted by Kembaallstar

... I just replaced my ibs because I was getting the code 2E8E-Intelligent Battery Sensor Missing and battery would drain out... Same code pops up...

Quote:

Originally Posted by Kembaallstar

... The car will start one day and the next it won't even crank

If a fully-charged battery shows LESS than 12.0 Volts after sitting for 8 hours, but it WILL hold a charge if (-) battery terminal is disconnected, then almost CERTAIN your alternator diodes (think "electrical check-valves") have failed, and battery power is "leaking back" into the alternator as it sits unused. At that rate of drain, you will probably feel the rear of the alternator (after removal of rear cover) warm to hot, and a "Clamp Meter" on the LARGE B+ cable that supplies power to the Starter & Alternator would be reading an Amp or Two+ DC Current.

George

relative4 · 11-03-2020, 05:44 PM

13.7 is too low. Your alternator and/or voltage regulator is/are bad.

Kembaallstar · 11-03-2020, 06:05 PM

Quote:

Originally Posted by relative4

13.7 is too low. Your alternator and/or voltage regulator is/are bad.

Quote:

Originally Posted by relative4

13.7 is too low. Your alternator and/or voltage regulator is/are bad.

could that be why the ibs code is still on?

Tunafish · 11-03-2020, 07:07 PM

Your voltage is normal for warm temps.. It will go up from there on colder temps... 13.7 means alternator is good. Like I said check connections..

Kembaallstar · 11-03-2020, 08:18 PM

Quote:

Originally Posted by Tunafish

Your voltage is normal for warm temps.. It will go up from there on colder temps... 13.7 means alternator is good. Like I said check connections..

Quote:

Originally Posted by Tunafish

Your voltage is normal for warm temps.. It will go up from there on colder temps... 13.7 means alternator is good. Like I said check connections..

should I focus more at the battery?

Daaaaaaaan · 11-03-2020, 09:11 PM

When the car doesn't crank, and then it does, what did you do to make it crank? Is the battery still dying? What's the voltage before it cranks and before it refuses to crank?? It's unclear what (if anything) mechanical is occurring after you replaced IBS cable. All you had said in first post is that the code returns.

Have you received any other instrument cluster errors ever? E.g. ABS lights?

Kembaallstar · 11-03-2020, 09:26 PM

Quote:

Originally Posted by Daaaaaaaan

When the car doesn't crank, and then it does, what did you do to make it crank? Is the battery still dying? What's the voltage before it cranks and before it refuses to crank?? It's unclear what (if anything) mechanical is occurring after you replaced IBS cable. All you had said in first post is that the code returns.

Have you received any other instrument cluster errors ever? E.g. ABS lights?

Quote:

Originally Posted by Daaaaaaaan

When the car doesn't crank, and then it does, what did you do to make it crank? Is the battery still dying? What's the voltage before it cranks and before it refuses to crank?? It's unclear what (if anything) mechanical is occurring after you replaced IBS cable. All you had said in first post is that the code returns.

Have you received any other instrument cluster errors ever? E.g. ABS lights?

I have to jump start my car. I have trickle charged it at times and the next day it might not start without a jump.

11-03-2020, 03:51 PM	#1
Kembaallstar New Member 2 Rep 21 Posts Drives: Bmw Join Date: Apr 2018 Location: N/A iTrader: (0)	IBS Sensor issue I just replaced my ibs because I was getting the code 2E8E-Intelligent Battery Sensor Missing and battery would drain out. I cleared the codes before replacing it. After replacing the ibs I scanned the car again. Same code pops up. I also tried switching the two blue connectors from the old ibs to the new ibs. Still shows same the code. I think it the problem might be the power distribution box on the battery, since its easy to mess up. Any ideas whats wrong?
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11-03-2020, 04:33 PM	#2
relative4 Major 611 Rep 1,272 Posts Drives: '08 335xi E90 MT stage 1+ Join Date: Feb 2019 Location: Denver, CO iTrader: (0)	The BSD has 4 consumers - IBS, alternator, WP, oil level sensor. A problem with one can knock out out any or all of the others. Since a missing/bad IBS will not drain the battery, take a look at your alternator. What is your voltage at idle?
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11-03-2020, 04:59 PM	#4
Tunafish Banned 262 Rep 818 Posts Drives: BMW 335i N55 Join Date: Dec 2019 Location: Home iTrader: (0)	Just have a bad connection you have to trace.
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11-03-2020, 05:44 PM	#7
relative4 Major 611 Rep 1,272 Posts Drives: '08 335xi E90 MT stage 1+ Join Date: Feb 2019 Location: Denver, CO iTrader: (0)	13.7 is too low. Your alternator and/or voltage regulator is/are bad.
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11-03-2020, 07:07 PM	#9
Tunafish Banned 262 Rep 818 Posts Drives: BMW 335i N55 Join Date: Dec 2019 Location: Home iTrader: (0)	Your voltage is normal for warm temps.. It will go up from there on colder temps... 13.7 means alternator is good. Like I said check connections..
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11-03-2020, 09:11 PM	#11
Daaaaaaaan Private First Class 88 Rep 161 Posts Drives: 08 323i Join Date: Mar 2012 Location: Hamilton iTrader: (0)	When the car doesn't crank, and then it does, what did you do to make it crank? Is the battery still dying? What's the voltage before it cranks and before it refuses to crank?? It's unclear what (if anything) mechanical is occurring after you replaced IBS cable. All you had said in first post is that the code returns. Have you received any other instrument cluster errors ever? E.g. ABS lights?
	Appreciate 0 Quote