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Discussion Starter · #1 ·
I just purchased a 2019 CR-V Touring.(traded in a 2013). I am traveling and the Low Tire Pressure sensor came on. We stopped and checked the pressure. It was 43 all around. (Apparently the tires were over-inflated at the dealership or before.) I called the service center and was told the the warning light would come on if the pressure was 3 lbs either way. So, when we stopped at a rest area, the pressure was then 48. We removed air so that it was within 3 lbs of the required psi, knowing that the tires were hot after 3 hours of highway driving. But, the warning light did not go out. Seems to me the pressure would vary more than 3 pounds when driving. So I don't know if I accept what the service advisor said. In addition, if the car is supposedly smart enough to say the pressure is low, why not say it is over-inflated when the pressure is too high???? Has anyone experienced this?
 

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Moved to the Gen5 area. :eek:

Did you perform the TPMS calibration after adjusting the pressure?
 

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If I remember correctly it's 33 in the front tires and 32 in the rear.
You have to reset the TPMS for the error to clear.
I am not sure if anyone is 100% sure how Honda implemented the TPMS system in software. It looks for differences in tire rotation speed, so if one is different than the other three it would certainly go off. Since 19" rims can be put on the vehicle I would expect that it would not alert you if ALL the tires are inflated to 48 PSI. Yours did so that means that it can tell the difference.

To reset go to the head unit press the home BUTTON then SETTINGS then VEHICLE and at the top you will see TPMS Calibration. Press that and then press CALIBRATE. The warning indicator should come off of the Dash display.


Rob
 

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If I remember correctly it's 33 in the front tires and 32 in the rear.
You have to reset the TPMS for the error to clear.
I am not sure if anyone is 100% sure how Honda implemented the TPMS system in software. It looks for differences in tire rotation speed, so if one is different than the other three it would certainly go off. Since 19" rims can be put on the vehicle I would expect that it would not alert you if ALL the tires are inflated to 48 PSI. Yours did so that means that it can tell the difference.

To reset go to the head unit press the home BUTTON then SETTINGS the VEHICLE and at the top you will see TPMS Calibration. Press that and then press CALIBRATE. The warning indicator should come off of the Dash display.


Rob
My 2017 CRV was delivered with the tire pressure set to 44. I left them that way for about a week, and then set them to what the manual states.

As for the TPMS, it is a system that monitors tire rotation speed on the newer Hondas. Which means it needs no special sensors in the tire like older models did, but it comes with a couple of quirks as well. One time my LKAS decided I was heading out of a lane on the Freeway (I wasn't but I was on a corner, so it over-reacted, as did LDW). And almost immediately after that I got a TPMS warning, so I pulled off the freeway to check tire pressure and they were all good.. so I simply hit the TPMS recalibration and drove off.. and the indicator light turned off and the system recalibrated with no more issues. I believe the recalibration will trigger TPMS to lock in the wheel speed represented by the current tire pressure, not some fixed number. Which begs the question as to how it deals with AWD and variations in wheel speed from the AWD doing what it is supposed to do.

With the newer TPMS... I do expect to get a false positive from time to time, though so far I only had the one. My wife had one early on with her 2018 Accord, which turned out to also be a false positive. Then later, TPMS warning for her Accord again, and this time it was correct as there was a slow leak from a nail. But the TPMS did not go off until the tire was nearly 10lbs low in pressure.... so I do question the service advisor stating that TPMS is sensitive to 3lbs to the original poster.
 

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My 2017 CRV was delivered with the tire pressure set to 44. I left them that way for about a week, and then set them to what the manual states.

As for the TPMS, it is a system that monitors tire rotation speed on the newer Hondas. Which means it needs no special sensors in the tire like older models did, but it comes with a couple of quirks as well. One time my LKAS decided I was heading out of a lane on the Freeway (I wasn't but I was on a corner, so it over-reacted, as did LDW). And almost immediately after that I got a TPMS warning, so I pulled off the freeway to check tire pressure and they were all good.. so I simply hit the TPMS recalibration and drove off.. and the indicator light turned off and the system recalibrated with no more issues. I believe the recalibration will trigger TPMS to lock in the wheel speed represented by the current tire pressure, not some fixed number. Which begs the question as to how it deals with AWD and variations in wheel speed from the AWD doing what it is supposed to do.

With the newer TPMS... I do expect to get a false positive from time to time, though so far I only had the one. My wife had one early on with her 2018 Accord, which turned out to also be a false positive. Then later, TPMS warning for her Accord again, and this time it was correct as there was a slow leak from a nail. But the TPMS did not go off until the tire was nearly 10lbs low in pressure.... so I do question the service advisor stating that TPMS is sensitive to 3lbs to the original poster.
Yes as I stated it does you the tire rotation speed but beyond that we know very little on how the specifics of the software is written to deal with that information. Your experience with it not normally going off with all tires at 44 PSI is what I would have expected, but the OP had a different experience. Maybe Honda tweaked the software for 2019.

Some personal theories on the software is that it would need to get feedback from computer to take into account the power being delivered to each wheel. That would certainly be needed for the AWD models and to recognize a tire problem even when the vehicle is cornering.

Personally I prefer the older TPMS system. That is one of the reasons I installed one in my CRV.

You can view the thread here.
https://www.crvownersclub.com/forums/137-2017-present-official-specs-features-etc-gen-5/177881-added-external-tpms-system-my-2018-crv.html


Rob
 

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If any sensor in the TPMS software has malfunctioned - you can get false TPMS lights - the dealer HDS diagnostic can see if a sensor has failed.

If all tires are the same pressure and same type and age - then you probably have one sensor that has come unplugged or has failed. Excessive dirt on the Anti-lock brake sensor have caused false positives too.
 

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As noted in the Owner's Manual, tires set to the correct press in warm weather can become under-inflated in colder weather, and tires at the correct press in cold weather can become over-inflated in warmer weather.

If you live in an area with large seasonal temp swings, you need to add air in the winter and release it in the summer.
The placard pressure (33/30 psi) is the press when the tires are at the coolest ambient temp of the season. Best time to check press is the early morning after the tires have sat outdoors overnight.

If your vehicle sits in a heated garage in the winter, you need to compensate for that. Tire press changes 1 psi for every 10 deg. F temp change. If tire press is at placard after sitting overnight in a 60 F garage and the coolest outside temp is -20 F, another 8 psi needs to be added to each tire for a garage press of 41/38 psi.
 

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Discussion Starter · #8 ·
When we got to our destination, I did recalibrate the tpms. All was good, until we left for our trip home. Tire pressure was checked and adjusted before we left. About 30 minutes into our highway driving, the warning appeared again. Grr.
 

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When we got to our destination, I did recalibrate the tpms. All was good, until we left for our trip home. Tire pressure was checked and adjusted before we left. About 30 minutes into our highway driving, the warning appeared again. Grr.
Did you recalibrate again after adjusting the pressures, and before you left?
 

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Didn't read everything but I always calculate pressure when cold. 33psi cold front 30psi rear as is recommended on the door. Recently had tires rotated and the dealer said they were they were under inflated and inflated them to 35 psi all around. When I told the teenage tech they were over inflated, he looked at the door and said "My gosh, You're right." TPMS only tells me I have a problem with low pressure. Dealers always inflate. I don't know why.
 

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I believe in the US it's 30/33 psi and just a good gauge!

Please do not forget to recalibrate.

Best to you!
 

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Didn't read everything but I always calculate pressure when cold. 33psi cold front 30psi rear as is recommended on the door. Recently had tires rotated and the dealer said they were they were under inflated and inflated them to 35 psi all around. When I told the teenage tech they were over inflated, he looked at the door and said "My gosh, You're right." TPMS only tells me I have a problem with low pressure. Dealers always inflate. I don't know why.
Unless your dealer took all the air out of the tires and pumped new air in, they should overinflate the tires a little bit to compensate for the warm/hot air alredy inside the tires. Common sense.
 

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Does anyone know why Honda dealers, seems to be all dealers around the U.S., inflate the tire pressure to over 40psi when the manual clearly indicates 33/30 as well as the door's sticker?
It gotta be a reason for that.
 

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Does anyone know why Honda dealers, seems to be all dealers around the U.S., inflate the tire pressure to over 40psi when the manual clearly indicates 33/30 as well as the door's sticker?
It gotta be a reason for that.
I think they come from the factory that way, to try to void flat spotting while in transit. The dealer is supposed to lower the pressures to the recommended level during their pre-delivery inspection (PDI) but it seems many dealers do not...and this is not unique to Hondas either. :Dunno:

Related, but off topic, when ever I take my vehicles into the dealer for service, (any brand!) they ALWAYS turn off the auto headlight setting, then leave it that way. I usually find out the first time i drive at night, and realize I don't have my headlights on. This is potentially a safety issue. The porter, or whoever brings the car up when you pick it up, should assure it is back in 'Auto" position before delivering the car back to the owner. I've now kinda trained myself to look at this whenever I get back my car before driving away. Rant off..
 

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Related, but off topic, when ever I take my vehicles into the dealer for service, (any brand!) they ALWAYS turn off the auto headlight setting, then leave it that way. I usually find out the first time i drive at night, and realize I don't have my headlights on. This is potentially a safety issue. The porter, or whoever brings the car up when you pick it up, should assure it is back in 'Auto" position before delivering the car back to the owner. I've now kinda trained myself to look at this whenever I get back my car before driving away. Rant off..
YUP - happened to me too. Luv being spoiled w/the Auto lights.
 

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Never use Auto lights. Many times they don't come on when needed during daytime rain. Wipers on? Headlights on. The law in some southern states I think because of common summer T-Storms.
 

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As you already know your CR-V does not have direct reading sensors in the wheels, so it cannot tell the actual air pressure. 25, 32 or 48 psi => the computer has no idea what's really in there. But what it does know is that the vehicle is not 'acting' like it should, so something is wrong.

The original 'first generation' indirect system only used wheel speed sensors to see which wheel might be spinning faster than the others. But if they are ALL over or underinflated, they will all rotate at the same rate and the system will be fooled into thinking all is good (even if it isn't...).

The 'second generation' indirect system uses key elements of the Stability Control system plus a lot of processing power to monitor how the vehicle reacts to turns, road pitch, acceleration, braking, wobble & shimmy, yaw & steering angle, etc. If the vehicle tracks as it should (as determined by Honda pre-programmed parameters supplemented by a successful Calibration procedure), then it assumes the tires are properly filled.

You can of course mess with that by doing the Calibration procedure under the wrong conditions, but lets assume that you adjusted air pressure correctly, are running 4 similar tires, etc.
 

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Never use Auto lights. Many times they don't come on when needed during daytime rain. Wipers on? Headlights on. The law in some southern states I think because of common summer T-Storms.
There is a setting which automatically turns on lights when wipers are on
 

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Haven't found that one. In Canada only? Your daytime running light law certainly has been around for many years.
could be canadian feature

but when headlights are in auto and if auto wipers are triggered due to rain, snow etc- full headlights comes on

It is under vehicle settings
vehicle- lighting setup - auto headlight on with wiper on- On/Off
 
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