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My 96 has LTPS. It seems to work fine 50% of the time and says the tires are low 50% of the time. At first I thought it was only at naight, maybe cold maid tires lower. Not the case now it does it during the day as well.
All tires have 30lbs in them.
Light comes on a few minutes after starting or not at all.
I can often turn the car off, restart it and the light stays off.
I have read 50 threads about these and none of them have this issue.
Im wondering if there is a piece of dirt or something inside the tire.
Original owner said it started happening when he got new tires.
My 96 has LTPS. It seems to work fine 50% of the time and says the tires are low 50% of the time. At first I thought it was only at naight, maybe cold maid tires lower. Not the case now it does it during the day as well.
All tires have 30lbs in them.
Light comes on a few minutes after starting or not at all.
I can often turn the car off, restart it and the light stays off.
I have read 50 threads about these and none of them have this issue.
Im wondering if there is a piece of dirt or something inside the tire.
Original owner said it started happening when he got new tires.
First off your tires are low. 32 is recommended. I always run higher than that. I ran about 40psi on my C4's because it helped vastly with tire wear.
It's likely that the tire installer either damaged the sensors or they were installed in the wrong location(s). I'd check for that first after getting more air in them.
Owners manual says they come on at 26lbs. 30 is not low.
Im not driving a Z51 around town with 40lbs in the tires.
1996 does not know its location. You can move them around all you want.
If it was damaged, it would come on all the time. Not once in a while.
The service light has never come on.
Owners manual says they come on at 26lbs. 30 is not low.
Im not driving a Z51 around town with 40lbs in the tires.
1996 does not know its location. You can move them around all you want.
If it was damaged, it would come on all the time. Not once in a while.
The service light has never come on.
'96 DTC is for the particular colored sensor so I'd say you could say that "it does know". I'd guess the LTPWS "battery(ies) are maybe slow to "wake up". The FSM does have a designated location "by color". Are they in the correct location? Maybe there's reason to believe NOT.
I'd guess you need to chase the DTC's.
There's both Low Tire Pressure DTC and also a Wheel Sensor DTC
Owners manual says they come on at 26lbs. 30 is not low.
Im not driving a Z51 around town with 40lbs in the tires.
1996 does not know its location. You can move them around all you want.
If it was damaged, it would come on all the time. Not once in a while.
The service light has never come on.
It does know the location. There are 4 different part numbers with 4 different colored tags. The labeling on the tag explains where they are supposed to go.
The difference in the 93-96 was for a lower psi activation but one or more could have been replaced with an earlier unit which had a higher psi activation. The easiest way to find out if it is pressure related is to increase the pressure and see if it goes away. If it does all you have to do is drop the tires individually until it comes back and you would know the culprit. You can also tell which sensor(s) are going off by scanning the computer
I know the color on the tags says where it went originally. But... GM decided not to make people remove the tires when rotating them. Moving them around will not trigger the low tire light. Hell parking next to another corvette with a flat tire will trigger the light. Location is meaning less.
I did not know earlier years were different rating. Thanks for that piece of info.
I know the color on the tags says where it went originally. But... GM decided not to make people remove the tires when rotating them.
I'd say this comment calls for a "Show me" - There's way to many things that need considered when "rotating" so I doubt that GM would make such a comment.
A "front/rear" rotation could only be accomplished on a 4 X 9 1/2 - 275 fitment so I just really have to doubt it.
I believe the FSM might even mention "can't be accomplished" because of various tire/wheel options.
Page 2-84 of the owners manual says "Low Tire light may come on if your vehicle is close to another vehicle that has LTPWS and has a low tire."
Location means nothing. The only thing you can tell is the color of the one that is bad.
Where on the car you place that tire means nothing.
Not everyone has staggered wheels. My car came with 17x9.5 all the way around.
It now has 18x9.5 with 285's all the way around, well will in a few days.
I still think there is dirt inside messing with the sensor.
Will find out in a few days when my new wheels get here. Will move the sensors and clean them.
I raised all the tires to 35 lbs. Will take a few days to tell if that has an effect.
Im sure if the tires were low it would not have been random. It would have just come on all the time.
But its an easy thing to check to make those trying to help happy.
It now has 18x9.5 with 285's all the way around, well will in a few days.
I still think there is dirt inside messing with the sensor.
Will find out in a few days when my new wheels get here. Will move the sensors and clean them.
I don't believe you'll be able to "move these" to your 18" wheels. The band as it's built won't do the larger barrel. Larger/longer band? A difficult find.
Location is everything - You see it stressed in conversation every day Location, location, location. C4 LTPWS I believe it's important, maybe not it's particular location but being intelligent enough to figure out the "where it is".
You can move the factory wheel sensors to 18" wheels. Mine were moved yesterday.
You cut the band and replace them with new ones. Local tire shop had the bands in stock $20 each.
The reason my light was coming on is because one sensor is aftermarket. It comes on around 28 lbs.
Since I was running 28lbs in the tires it would come on when the tires were cold.
Not happy about this design, but nothing we can do now. They are very heavy and add a lot of weight to the
wheels. not jsut the weight of them, but the weight to balance them out.
You can move the factory wheel sensors to 18" wheels. Mine were moved yesterday.
You cut the band and replace them with new ones. Local tire shop had the bands in stock $20 each.
The reason my light was coming on is because one sensor is aftermarket. It comes on around 28 lbs.
Since I was running 28lbs in the tires it would come on when the tires were cold.
Not happy about this design, but nothing we can do now. They are very heavy and add a lot of weight to the
wheels. not jsut the weight of them, but the weight to balance them out.
I've know a couple attempt the after-market bands and they failed "miserably" - maybe your experience will be better. The ORANGE actually isn't an after-market but I believe that once these were released by GM as replacements they were very problematic. Discontinued because of issues, supply of them was never substantial. Yours might be the first one I've actually seen that had been installed and maybe functioned at all.
Interesting. From what I was told they have worked for the last 3 years. Thats when the guy I bought it from got the car. Everything worked fine when he got it.
I trust this tire shop. I know the owner and manager. They would not have used cheap bands in my car.
I am new to topic but wondering if it is possible to change out the piezoelectric (?) battery? My tire guy busted mine, so I had to find the left rear replacement but now need to go 60 to make the "service" light go out. Or, could just remove the bulb I guess.
In the earlier cars as a point of reference that might help others I have been told they just compare tire speeds to each other to see if one is low. No idea if true but might be as removed all 4 from my 91 and no light. The other thing mentioned and happed to race a C4 when new in Nevada I think the Silver State whatever and there were failures of the bands with continued high speed and would trash a tire from the inside.
On my 04 MB, we had 1 reporting, 1 maybe and 2 dead. Changed to new ones and life is good. They were original and the PO got tired of the error code so he had the tech use SD-Connect and turn it off. I turned it on and got the error codes so we changed them all.
Maybe you have a bad battery? Not sure if they are piezoelectric.
02-22-2016, 12:40 PM
LTPS get dirty?
