new tires = low tire pressure warning?

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new tires = low tire pressure warning?

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new tires = low tire pressure warning? - 7/25/2007 7:20:19 AM

djbrow3

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Joined: 3/21/2006
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I recently changed out the tires on my '06 H3. I went from the original 265/75/16 to 285/75/16. The fit wasn't a problem. Now about 4 days later, the low tire pressure warning light has come on and stays on. I checked and there is one major difference between these tires and stock. Stock required 45psi, these new tires say 65psi. I checked all 4 tires and they are at 65 still, so I know it isn't a leak.

Is there something in the computer that needs to be changed for these new tires? I had also thought maybe when the change was done they broke one of the sensors? But if that was the case, why would it take 4 days before the light came on?
I actually have an appointment with the service dept. for oil change and such, but figured I'd see if anyone else here who has changed out tires had a similiar issue.

< Message edited by djbrow3 -- 7/25/2007 7:23:19 AM >

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RE: new tires = low tire pressure warning? - 7/25/2007 7:24:56 AM

Dennis

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There is a calibration procedure I think in the Owner's manual....And 40 PSI is enough.

< Message edited by Dennis -- 7/25/2007 7:26:16 AM >

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RE: new tires = low tire pressure warning? - 7/25/2007 7:27:12 AM

djbrow3

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Thanks, Dennis. When I get home tonight I'll RTFM and see if I can set calibration for the new tires.

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RE: new tires = low tire pressure warning? - 7/25/2007 7:34:18 AM

Dennis

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RTFM

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RE: new tires = low tire pressure warning? - 7/25/2007 8:35:41 AM

mfish

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Joined: 4/9/2007
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Dude...your gonna blow a tire with that much pressure

. I hope your not getting the pressure off the side of the tire. I wouldnt go over 40. I have the stock 33's and I keep em around 37psi, 35 psi is what the door sticker says.

_____________________________

06 H3; adventure & lux package; Gibson catback; readylift leveling kit; and some other stuff...

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RE: new tires = low tire pressure warning? - 7/25/2007 8:41:07 AM

Dennis

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No Matt...the 285's can handle 50 MAX...so 40PSI is ideal.

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RE: new tires = low tire pressure warning? - 7/25/2007 8:51:40 AM

mfish

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my point was that I wouldnt go over 40 psi for good tire wear, not that the tires couldn't handle it. The recommended pressure for the vehicle using those tires is in the door jam ( mine says 35 psi ). Most people ( not saying you do ) make the mistake of getting the recommended pressure off the tires, which as you said only lists the max.

_____________________________

06 H3; adventure & lux package; Gibson catback; readylift leveling kit; and some other stuff...

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RE: new tires = low tire pressure warning? - 7/25/2007 8:54:40 AM

Dennis

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Don't know where he got the 65 psi though..

< Message edited by Dennis -- 7/25/2007 8:56:43 AM >

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RE: new tires = low tire pressure warning? - 7/25/2007 9:22:34 AM

importkiller

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EVEry tire is different as far as what it wants in air pressure for good tire wear...I don't mean every kind of tire I mean EVERY tire....have 4 tires you will normally have 4 different psi readings for perfect wear. The only way to really find what each tire wants is to make a line with chalk or a wax pencil from inner part of tire to outer part of tire on the top of the treads...then go for a drive around the block. When you get back note the line, if the entire line is gone then you are at perfect pressure as the entire footprint is making contact. If the outside edges are left and the center is worn then you are overinflated, center left and outside edges worn means you are underinflated. Every tire on your ride will need a different pressure and this process will need to be repeated several times a tire making different pressure changes...make note on paper what each tire needs so that future checks will be easy.

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RE: new tires = low tire pressure warning? - 7/25/2007 9:40:11 AM

djbrow3

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I did get the 65 psi from the side of the tire. Which is also what the tire jockeys inflated them to upon installation. When I get home tonight I'll lower them to between 45 and 50 psi based on comments here. I wasn't sure what was ideal for the 285's.

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RE: new tires = low tire pressure warning? - 7/25/2007 10:09:40 AM

Dennis

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What brand of tire do you have..I was referring to the Bridgestone duelers that came with mine..

No.. one pressure for all of them, do not vary 1 pound between them or this will set off the TPM again....That's how the sytem works..it compares diferences in tires pressures....This includes the SPARE.

< Message edited by Dennis -- 7/25/2007 10:11:12 AM >

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RE: new tires = low tire pressure warning? - 7/25/2007 10:31:13 AM

importkiller

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The spare has a sensor in it but it is not read, only the four corners are read. I am almost positive that the four corners are not compared to each other but instead are monitored individually.

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RE: new tires = low tire pressure warning? - 7/25/2007 10:32:19 AM

jpac4lyf

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my '07 h3 is at the dealer. I have the bridgestone adventure 33's... they mentioned they'll check all 5 sensors and may replace sensors entirely OR put on stock tires. What does this mean and how is it different than ones I have on currently?

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RE: new tires = low tire pressure warning? - 7/25/2007 10:45:26 AM

Dennis

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The way is see it, they are being compared..I'm too lazy right now to go look for it..But somewhere I read that to keep the each tire within 1.5 PSI of each other. so...that's my deduction on it it at least..You maybe right about the spare, but if you replace it with one of the road tires as during a rotation, you don't want to throw the odd ball pressure in the mix...

< Message edited by Dennis -- 7/25/2007 10:46:46 AM >

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RE: new tires = low tire pressure warning? - 7/25/2007 10:57:18 AM

mfish

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Joined: 4/9/2007
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I think importkiller is correct on this one.

quote:

ORIGINAL: importkiller

The spare has a sensor in it but it is not read, only the four corners are read. I am almost positive that the four corners are not compared to each other but instead are monitored individually.

_____________________________

06 H3; adventure & lux package; Gibson catback; readylift leveling kit; and some other stuff...

(in reply to importkiller)

Post #: 15

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