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Discussion Starter #1
I have a 2018 Accord Sport 1.5T (CVT) - my TPMS light came on three different times. Tire pressure is spot on. Is anyone else seeing this... very odd. Only when I'm on the highway (apparently TPMS doesn't monitor during street driving).
Look what the write up says in the owner's manual.... Jeez..

...'Instead of directly measuring the pressure in each tire, the TPMS on this vehicle
monitors and compares the rolling radius and rotational characteristics of each
wheel and tire while you are driving to determine if one or more tires are
significantly under-inflated. This will cause the low tire pressure/TPMS indicator to
come on and a message to appear on the driver information interface...' :surprise:
 

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I would double check all your tires for a possible nail or other hazard regardless.
 

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Try re-calculating the TPMS. (See Owner's Manual page 497-499)
 

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Check for a loose valve stem while you're at it. I also wonder if you have a defective rim. Hopefully, the dealer can figure out the problem.

BTW, What PSI are your tires?
 

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Discussion Starter #7
Check for a loose valve stem while you're at it. I also wonder if you have a defective rim. Hopefully, the dealer can figure out the problem.

BTW, What PSI are your tires?
33PSI - I never lost tire pressure ever...

I agree with you...initially, I thought it might be a problem with the tire and or the rims...

It seems to me that the Honda team of programmers who wrote the code that's behind the TPMS system got carried away...
My 2012 Sonata had a TPMS and you know what it did? It measured tire pressure ALL the time... and it did it very well.

Yesterday, I brought the car into the dealer... I told my service advisor exactly what happened and he admitted that the TPMS is a 'pain in the ass' ... When I got the car back - all it said was they adjusted the tire pressure (they were ok when I brought it in) and ran the reclaibration again... Advisor also told me that if the light comes on again to call him directly...
 

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Hopefully the root cause of your TPMS problem can be found and fixed.

Your Sonata uses valve stem sensors in the wheels which transmits PSI info to the TPMS. Older Accords also used valve stem sensors. My 8th and 9th Gen Accords had those sensors. However, the 10th Gen Accords do not have valve stem sensors, but rather the TPMS measures wheel rotation to determine changes in tire pressure.

Thus, I conclude that there's something about the wheel rotation (e.g., faulty rim) or the unit that sends wheel rotation info that's causing your TPMS issue. Unfortunately, the Accord doesn't indicate which wheel is causing the problem.
 

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Hopefully the root cause of your TPMS problem can be found and fixed.

Your Sonata uses valve stem sensors in the wheels which transmits PSI info to the TPMS. Older Accords also used valve stem sensors. My 8th and 9th Gen Accords had those sensors. However, the 10th Gen Accords do not have valve stem sensors, but rather the TPMS measures wheel rotation to determine changes in tire pressure.

Thus, I conclude that there's something about the wheel rotation (e.g., faulty rim) or the unit that sends wheel rotation info that's causing your TPMS issue. Unfortunately, the Accord doesn't indicate which wheel is causing the problem.

HMmmm , do You know where the Sensors are ? seeing this is NOT AWD , I would think then Honda -placed Dual Purpose on the ABS ? :nerd:
 

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Discussion Starter #10
Hopefully the root cause of your TPMS problem can be found and fixed.

Your Sonata uses valve stem sensors in the wheels which transmits PSI info to the TPMS. Older Accords also used valve stem sensors. My 8th and 9th Gen Accords had those sensors. However, the 10th Gen Accords do not have valve stem sensors, but rather the TPMS measures wheel rotation to determine changes in tire pressure.

Thus, I conclude that there's something about the wheel rotation (e.g., faulty rim) or the unit that sends wheel rotation info that's causing your TPMS issue. Unfortunately, the Accord doesn't indicate which wheel is causing the problem.

So is there something in the wheel that's doing measuring?
 

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There's no sensor in the wheel itself. However, I believe wheel rotation measurements are taken from the ABS sensor since it also tracks wheel rotation.

I remember reading about the new type of TPMS when the 10th Gen Accord was introduced.
 
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