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TomT
Posts: 10565
Joined: Sun Aug 08, 2010 12:09 pm
Delivery Date: 01 Mar 2011
Leaf Number: 000360
Location: Foothills of Granada Hills, CA
Contact: Website

Re: Low tire pressure warning

Mon Sep 19, 2011 12:05 am

I generally run 4 pounds over the factory pressure on all my vehicles for better handling and tire life. I set the tires on the Leaf to 40 pounds when I got it and have not had to add air since. I checked them today cold and they are still at 40...

ggodman wrote:I've had my light on for a while now, finally filled them tonight, 1 @ 29 and 3 @ 30, this is strange, i'm not sure if they were not filled correctly or there is a slow leak with these tires, I will check pressure again in a couple weeks and let you know the results.
59,991 miles/12 bars/289 Gids/68.54 AHr/101% SOH/101.64% Hx 7May15 w/ new Lizard (barely made the warranty).
71,770 miles/12 bars/256 Gids/59.04 AHr/88% SOH/87.92% Hx 3Mar16 at lease return.

Now driving a 2016 Volt Premier. Model 3 reserved.

LEAFfan
Posts: 4826
Joined: Fri Apr 23, 2010 6:08 pm
Delivery Date: 08 Jun 2011
Leaf Number: 1855
Location: Phoenix Area

Re: Low tire pressure warning

Mon Sep 19, 2011 12:09 am

TomT wrote:I generally run 4 pounds over the factory pressure on all my vehicles for better handling and tire life. I set the tires on the Leaf to 40 pounds when I got it and have not had to add air since. I checked them today cold and they are still at 40...


Wow, that's unusual. I've never had a car yet that after a month wasn't a pound or two lower. And that just isn't here, but the Midwest as well. How many hours do you wait after driving to check them? I know it takes a long time for them to cool down.
2013 LEAF SV Del. 2/28/13
2013 LEAF World Record for Most Miles Driven On One Charge-188 miles/8.8 m/kW h
4.8 kW DC PV ($ .91/W fully installed)/ Dec., 2010

mark13
Posts: 393
Joined: Tue Sep 14, 2010 2:28 pm

Re: Low tire pressure warning

Mon Sep 19, 2011 12:12 am

Kind of funny I just had the light come on also 4 days ago..All the tires had 30-32 PSI,I filled them up to 35 psi...I see where Leaffan went with 40 psi,I may try that next time..

LEAFfan
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Joined: Fri Apr 23, 2010 6:08 pm
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Leaf Number: 1855
Location: Phoenix Area

Re: Low tire pressure warning

Mon Sep 19, 2011 12:42 am

mark13 wrote:Kind of funny I just had the light come on also 4 days ago..All the tires had 30-32 PSI,I filled them up to 35 psi...I see where Leaffan went with 40 psi,I may try that next time..


36 is the recommended pressure (on the inside sticker/plate), but it gives you better rolling resistance at higher pressure.
2013 LEAF SV Del. 2/28/13
2013 LEAF World Record for Most Miles Driven On One Charge-188 miles/8.8 m/kW h
4.8 kW DC PV ($ .91/W fully installed)/ Dec., 2010

Vitor
Posts: 27
Joined: Sun Mar 13, 2011 10:24 pm

Re: Low tire pressure warning

Mon Sep 19, 2011 2:01 pm

I guess this has not been mentioned before.

The tires are rated for 44 PSI, that is the tire manufacturer rated pressure on the sidewall.

When I picked up my Leaf something did not look right with the tires (I worked at Goodyear for a few years and got to know a lot about black donuts). I checked the pressure and all were around 28 PSI.
I pumped them up to 45 and at 44 the horn beeps telling you when you have reached the 44 PSI pressure mark.
Very nice and easy feature, you pressurize to the rated pressure. Look, no hands and no gauge Ma'.

The ride is rougher than 28PSI but the economy is great.
This is nothing compared to my Mini at the same tire pressure, the tooth fillings come off on LA freeways.
Reserved 4/10, ordered 1/11, delivery August 5th.
Ex-driving 04 Honda Hybrid, 01 Honda CNG, 06 Lexus Hybrid, 03 Mini Cooper S and 99 Volvo V70XC.

User avatar
TomT
Posts: 10565
Joined: Sun Aug 08, 2010 12:09 pm
Delivery Date: 01 Mar 2011
Leaf Number: 000360
Location: Foothills of Granada Hills, CA
Contact: Website

Re: Low tire pressure warning

Mon Sep 19, 2011 2:11 pm

I agree! I've never had that be the case before either! At first, I thought my gauge was stuck! :lol:

I normally check them in the morning before I drive it that day.

One thought though... It has generally been getting progressively warmer since I bought it which might have masked any actual pressure loss...

LEAFfan wrote:
TomT wrote:I generally run 4 pounds over the factory pressure on all my vehicles for better handling and tire life. I set the tires on the Leaf to 40 pounds when I got it and have not had to add air since. I checked them today cold and they are still at 40...


Wow, that's unusual. I've never had a car yet that after a month wasn't a pound or two lower. And that just isn't here, but the Midwest as well. How many hours do you wait after driving to check them? I know it takes a long time for them to cool down.
59,991 miles/12 bars/289 Gids/68.54 AHr/101% SOH/101.64% Hx 7May15 w/ new Lizard (barely made the warranty).
71,770 miles/12 bars/256 Gids/59.04 AHr/88% SOH/87.92% Hx 3Mar16 at lease return.

Now driving a 2016 Volt Premier. Model 3 reserved.

User avatar
TomT
Posts: 10565
Joined: Sun Aug 08, 2010 12:09 pm
Delivery Date: 01 Mar 2011
Leaf Number: 000360
Location: Foothills of Granada Hills, CA
Contact: Website

Re: Low tire pressure warning

Mon Sep 19, 2011 2:18 pm

Actually, it has been discussed before in other threads on here...

I suspect that all you have gained by going to 45 pounds is a slight loss of traction (mostly in braking, somewhat less so in cornering) and a harder ride. Anecdotal evidence indicates that the difference in rolling resistance between 40 and 45 is barely measurable...

What really bother me though, is those people who think it is perfectly acceptable to go way beyond the maximum tire pressure listed on the sidewall. That is simply dangerous.

Vitor wrote:The tires are rated for 44 PSI, that is the tire manufacturer rated pressure on the sidewall. When I picked up my Leaf something did not look right with the tires (I worked at Goodyear for a few years and got to know a lot about black donuts). I checked the pressure and all were around 28 PSI. I pumped them up to 45 and at 44 the horn beeps telling you when you have reached the 44 PSI pressure mark.
Last edited by TomT on Mon Sep 19, 2011 3:48 pm, edited 1 time in total.
59,991 miles/12 bars/289 Gids/68.54 AHr/101% SOH/101.64% Hx 7May15 w/ new Lizard (barely made the warranty).
71,770 miles/12 bars/256 Gids/59.04 AHr/88% SOH/87.92% Hx 3Mar16 at lease return.

Now driving a 2016 Volt Premier. Model 3 reserved.

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garygid
Gold Member
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Delivery Date: 29 Mar 2011
Leaf Number: 000855
Location: Laguna Hills, Orange Co, CA

Re: Low tire pressure warning

Mon Sep 19, 2011 2:24 pm

Did you say that at 44 psi, when filling a tire, the LEAF's horn sounds?

Does the LEAF need to be ON?

Does the horn also sound below 20 psi (or some such)?
See SOC/GID-Meter and CAN-Do Info
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2010 Prius, 2014 silver Tesla S
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Vitor
Posts: 27
Joined: Sun Mar 13, 2011 10:24 pm

Re: Low tire pressure warning

Mon Sep 19, 2011 3:33 pm

The system was on, my son was setting up the blutooth. I guess you can call it position I or accessory.

Loss of traction on a Leaf? mmmmm, I don't know what that is.
Loss of traction on a Mini Cooper S? = nice youtube video with lots of smoke. I've seen me do it.
I don't think the comment applies to me. 1 PSI over 44 should not be way over the manufacturer rated pressure.
Reserved 4/10, ordered 1/11, delivery August 5th.
Ex-driving 04 Honda Hybrid, 01 Honda CNG, 06 Lexus Hybrid, 03 Mini Cooper S and 99 Volvo V70XC.

HighDesertDriver
Posts: 454
Joined: Thu Jun 30, 2011 7:29 am
Delivery Date: 09 Sep 2011
Leaf Number: 8765
Location: Palmdale, CA

Re: Low tire pressure warning

Thu Oct 13, 2011 1:52 pm

wsbca wrote:
Volusiano wrote:
TomT wrote:Here is what the service manual says about pressures:
...28 psi) [Standard air pressure is 36 psi)
I'm pretty sure none of my tires dropped to 28 psi when my warning light came on. The lowest one was 33 psi.
We checked ours today and all were at 31 (now at 36) - no warning lights.
No warnings on ours. All pressures 31 to 32. Assuming our's were properly services at delivery, a loss of 5psi in 5 weeks seems excessive. Anyone else have the same experience? Thanks!
2011 Glacier Pearl SL QC
Manf: 8/11 Delivered: 9/9/11
58,900 miles 10/09/15; New 2015 Bat 6/00/15, 55558; 66.14AHr
1BC 6/22/13@28310; 2BC 3/23/14@39750; 3BC 9/30/14@46,292; 4CB 6/12/15@55175, 170-185 G; 43.27AHr
PV: 7.2kW, ~13,500 kWh/yr since 3/06

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