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Hi guys, can you tell me if the alternator / voltage should ever be reading same when idling or driving the car as it is with engine off? I have noticed sometimes when I'm driving the voltage only goes up to 13.6 to 14.5 when I ease off the accelerator and am coasting in gear or braking. Is this "normal" for an E91? Sometimes it kicks in at 14.5 to 14.7 immediately at idling when parked and stays like that the whole drive.... Is this just normal maintenance of the battery by a functioning alternator system, or is there a problem with the alternator? Also FYI I know the serpentine belt needs changed and am about to have that done as the belt is cracking now that it's done 210k miles 🙂 Just wondering if the belt being old and at least one pulley squealing would also contribute to the voltage being patchy like it is occasionally from the alternator?
Hi guys, can you tell me if the alternator / voltage should ever be reading same when idling or driving the car as it is with engine off? I have noticed sometimes when I'm driving the voltage only goes up to 13.6 to 14.5 when I ease off the accelerator and am coasting in gear or braking. Is this "normal" for an E91? Sometimes it kicks in at 14.5 to 14.7 immediately at idling when parked and stays like that the whole drive.... Is this just normal maintenance of the battery by a functioning alternator system, or is there a problem with the alternator? Also FYI I know the serpentine belt needs changed and am about to have that done as the belt is cracking now that it's done 210k miles 🙂 Just wondering if the belt being old and at least one pulley squealing would also contribute to the voltage being patchy like it is occasionally from the alternator?
Thanks I'm getting 11.9/12.0v when off, I think my battery is on its way out and causing Check engine light with 2B13 error code on the DME when I do a scan.
I’m in the US and my vehicle had one letter and the rest numbers. It didn’t work at first. What I did was only count the last 5 numbers and didn’t include the one right after the letter. 👍🏾
My voltage reads around 11.6v using this method. Thanks for the info. You also have a video on alternator diodes. Can the diodes be replaced separately or does the whole alternator have to go? Any alternator brand replacement suggestion?
Upon further troubleshooting it turned out that the bolt to the serpentine belt tensioner partially sheered off, which cause the belt to slip and the alternator to stop charging. Nothing wrong with the Alt after all. I think the tensioner was a little over $20 and the repair was a piece of cake.
Mine is staying at 14 drops to 13 when putting lights on and air con on then back to 14, but when I put my foot on the Accelerator, it drop to 12. Is that normal ?
A good battery will sit at a steady 12v when charged. If your getting anything under that, your car is draining your battery. I'm getting 13.9 - 14.3 when I'm driving, I also know I need a new alternator, so I'm inclined to believe we need more.
I have a 08 X5 runs ans drives good every now and then Ike twice a week the dash will light up and car ac wouls turn down and start showing 4x4 and abs malfunction and says drive moderately and then die. If I wait about 30 mins it would start and run again
Hey man thanks for the vid but i cant seem to see the voltage with the procedure u mentioned. My code is 16 (44323) so when i go to menu 16 it just goes back to the main dial. Pls help!
much easier way..just put in a cigarette socket USB connector which showed you the voltage automatically on its display. Cost you online just about 5 or 6$
REMEMBER - Just add UP the LAST 5 Digits. My car showed the letter A followed by 6 digits which added up to 33. 33 did not work, however when I added up the last 5 digits I got a different number 24 which when entered worked perfectly. My voltage is reading 11.4 and wont to 11.0 when the AC was on. Hmn...
In my Chevy there are gauges for oil pressure, oil temperature, water temperature, and voltage. I don't have to pump codes and solve equations to get basic necessary system information. F*&king German Engineering. I also own an E90 btw. I came here wondering how to access basic troubleshooting information. FFS what a joke.
⛐ Check out our Garage to see what tools we use and recommend:
www.amazon.com/shop/worldmechanics
⛐ Subscribe and hit the notification bell by the subscribe button for new videos:
th-cam.com/channels/k_lcDzEWLs5fVRYceK3-9Q.html
⛐ Our GoFundme Page: www.gofundme.com/auto-repair-guys
Hi guys, can you tell me if the alternator / voltage should ever be reading same when idling or driving the car as it is with engine off? I have noticed sometimes when I'm driving the voltage only goes up to 13.6 to 14.5 when I ease off the accelerator and am coasting in gear or braking. Is this "normal" for an E91? Sometimes it kicks in at 14.5 to 14.7 immediately at idling when parked and stays like that the whole drive.... Is this just normal maintenance of the battery by a functioning alternator system, or is there a problem with the alternator? Also FYI I know the serpentine belt needs changed and am about to have that done as the belt is cracking now that it's done 210k miles 🙂 Just wondering if the belt being old and at least one pulley squealing would also contribute to the voltage being patchy like it is occasionally from the alternator?
Thanks BMW, this is so much easier than having a voltage gauge in the car or coolant temp gauge.
Love this guy and his other channel!
Thanks, another great no BS video!
I'm getting 14.6 to 14.7 while park with lights and AC on. Thanks to this Vid.
Good video and your English is very funny lol
Damn! Crazy ass Nintendo cheat code!!! Thanks
Thank you very much, this was really helpful.
Hi guys, can you tell me if the alternator / voltage should ever be reading same when idling or driving the car as it is with engine off? I have noticed sometimes when I'm driving the voltage only goes up to 13.6 to 14.5 when I ease off the accelerator and am coasting in gear or braking. Is this "normal" for an E91? Sometimes it kicks in at 14.5 to 14.7 immediately at idling when parked and stays like that the whole drive.... Is this just normal maintenance of the battery by a functioning alternator system, or is there a problem with the alternator? Also FYI I know the serpentine belt needs changed and am about to have that done as the belt is cracking now that it's done 210k miles 🙂 Just wondering if the belt being old and at least one pulley squealing would also contribute to the voltage being patchy like it is occasionally from the alternator?
Need help : i have 320i 2007 E90 need to replace the battery so can you kindly advise me which one will be better for the cars, sam from London
Does this work the same for 2006 530xi 6speed?
Lmao, I did this and the low battery light came on 😂
Last time mine died showing the battery sign now this time it died again but there’s no battery sign
I have a volt reader on my 12v socket, I watched this video for no reason 🙃 but I did learn how to do it without 😅
Thanks I'm getting 11.9/12.0v when off, I think my battery is on its way out and causing Check engine light with 2B13 error code on the DME when I do a scan.
I’m in the US and my vehicle had one letter and the rest numbers. It didn’t work at first. What I did was only count the last 5 numbers and didn’t include the one right after the letter. 👍🏾
Same here, used code 19 then the sub code under was my last 5 digits added up. Thanks!!!
Thanks!! this worked!!
can one drive the car while in this test mode to follow alternator charging levels?
Yes
solution verified. It works. Thank you!
Another but of info. Dont search for numbers, the last 5 of our VIN are the numbers, save some time.
Very useful thank you!
Mine doesn’t pull it up, please help!
Thanks for your video mate,
My voltage reads around 11.6v using this method. Thanks for the info. You also have a video on alternator diodes. Can the diodes be replaced separately or does the whole alternator have to go? Any alternator brand replacement suggestion?
Upon further troubleshooting it turned out that the bolt to the serpentine belt tensioner partially sheered off, which cause the belt to slip and the alternator to stop charging. Nothing wrong with the Alt after all. I think the tensioner was a little over $20 and the repair was a piece of cake.
Nice feedback
Mine is staying at 14 drops to 13 when putting lights on and air con on then back to 14, but when I put my foot on the Accelerator, it drop to 12. Is that normal ?
what is that warning light when you 1st press button (looks like a red box with dots in it and a fan above it)
Usually something too do with exhaust filtering. Too much dirt, no clean air, etc
So what voltage should implement a new alternator? Example 11 volts when lights are turned on etc. Thanks you rock
would like to know the same
@@sailingdev ok
When the car is running you should see around 13-14v, if you're consistently under that I would check the alternator.
A good battery will sit at a steady 12v when charged. If your getting anything under that, your car is draining your battery. I'm getting 13.9 - 14.3 when I'm driving, I also know I need a new alternator, so I'm inclined to believe we need more.
I've also compared the readout to a multimeter at the battery and they are the same.
This voltage display shows every time I start the engine. How to disable it? :D
Good job brother
14.8V is that normal ??? (Bmw E92 320i)
I have a 08 X5 runs ans drives good every now and then Ike twice a week the dash will light up and car ac wouls turn down and start showing 4x4 and abs malfunction and says drive moderately and then die. If I wait about 30 mins it would start and run again
You sound like the French guy from Talladega nights
I never knew! Thanks!
Thank you very much 🙏
Hey man thanks for the vid but i cant seem to see the voltage with the procedure u mentioned. My code is 16 (44323) so when i go to menu 16 it just goes back to the main dial. Pls help!
you go to menu 19, then enter your code, 16.
my clock an date keeps resetting is it to do with my battery if so do i need a new battery?
My car has exactly the same problem, I'm going to fit a new battery tomorrow and see if it fixes the issue.
l34052 Ok mate keep me updated if it fixes the issue you need to code the battery in also if it’s past a 2006 model i think
l34052 did you change it mate?
@@TheLoneRanger1992
I changed it today so it's too early to tell if it has or not, I'll keep you posted though mate👍
l34052 any joy mate with new battery?
I heard your mom it's around the Union😂
much easier way..just put in a cigarette socket USB connector which showed you the voltage automatically on its display. Cost you online just about 5 or 6$
Awesome!! Thx
Didn't work when you made a mistake you should have backed up and started the video over again
Yeah, kind of confusing.
how often do i need to get the brake pads changed?
After 5 years if u driving 12.8k a year 👍Depends on your driving style and where u driving… motorway or city👍
When you hear the calipers hitting the rotors you will know then haha
I got 15v is that bad
On mine it was up up down down left right left right B A start.
the most confusing video ever
REMEMBER - Just add UP the LAST 5 Digits. My car showed the letter A followed by 6 digits which added up to 33. 33 did not work, however when I added up the last 5 digits I got a different number 24 which when entered worked perfectly.
My voltage is reading 11.4 and wont to 11.0 when the AC was on. Hmn...
how do u add it up? with letters lol
2009 bmw 328i, doesnt work for me.
Didn’t work menu 9 goes back to start all over again
E90 320i battery 12.04 with multi meter, but car meter only display 11.6. there's a big difference here...approximately 0.44V
👌😎🙏🏻😊
In my Chevy there are gauges for oil pressure, oil temperature, water temperature, and voltage. I don't have to pump codes and solve equations to get basic necessary system information. F*&king German Engineering. I also own an E90 btw. I came here wondering how to access basic troubleshooting information. FFS what a joke.
My car brought up all kinda a shit
Jesus that accent. Is that English?
Will this work on a BMW 1 series (e87) 2007?
Yes it works I have the same spec car