TPM-high presure error code
Thread Starter
Instructor
Joined: Aug 2008
Posts: 204
Likes: 0
From: Lake Placid Florida
TPM-high presure error code
Hey folks, This place is great with a bunch of great folks, and with that I have a question...The last owner of my '98 coupe replaced the tires with original Goodyear EMT's, I was so tired of the ride and sound when time to replace them I went with Toyo Proxes T1r's. They require more pressure than the Goodyears and the TPM shows all tires having too high pressures. I've done the reset thing with the DIC and still get the high pressure warnings. Is there a way to tell the TPM system it's ok and to expect that pressure, or maybe make it ignore them alltogether ? This is the only error code I'm getting and it's constant. These tires require between 45 and 50 lbs pressure, have 46 in all 4 verified by a hand-held guage and the TPM system. Any ideas how to do this ?
Melting Slicks
Joined: Oct 2007
Posts: 2,383
Likes: 13
From: Kinston North Carolina
This is crazy, inflate tires to what is on the door placard, 30* cold. The # on the tire is the max pres that it should be under max load or seating the bead. The C5 is not max load.
Safety Car
Joined: Aug 2000
Posts: 4,933
Likes: 29
From: San Rafael CA
Hey folks, This place is great with a bunch of great folks, and with that I have a question...The last owner of my '98 coupe replaced the tires with original Goodyear EMT's, I was so tired of the ride and sound when time to replace them I went with Toyo Proxes T1r's. They require more pressure than the Goodyears and the TPM shows all tires having too high pressures. I've done the reset thing with the DIC and still get the high pressure warnings. Is there a way to tell the TPM system it's ok and to expect that pressure, or maybe make it ignore them alltogether ? This is the only error code I'm getting and it's constant. These tires require between 45 and 50 lbs pressure, have 46 in all 4 verified by a hand-held guage and the TPM system. Any ideas how to do this ?
Look at the tire placard (sticker) in the drivers door area. It specifies a 30 PSI pressure for your tires. Set your tires to that pressure (cold) and you will find several benefits ....
1) The warning messages will go away ... your tires are currently dangerously over-inflated
2) Your tires will wear evenly across the tread ... extending the life of your tire.
3) Your handling will improve through corners ... right now your contact patch is very small because only the very center of the tire tread is contacting the road.
4) The quality of your ride will improve ... right now if you drive over a twig the shock will be transmitted to the vehicle ... with a "softer" tire the impact of the twig will be absorbed by the softer tire, not the frame of the car, or your ***.
Reset the tires to 30 PSI and your car will be much happier ... and your wallet will be happier too.
Thread Starter
Instructor
Joined: Aug 2008
Posts: 204
Likes: 0
From: Lake Placid Florida
WOW, thanks guys, that's exactly why I posted the question. Owning and driving a Vette is a whole lot different than owning and driving a big truck or my Harley. Never crossed my mind to look at the door sticker, DUH, thanks again.
Heel & Toe
Joined: Sep 2010
Posts: 19
Likes: 0
Dragging up an old post.. however I just ran into this problem. Not sure the answers here are correct.
I replaced my run-flats on my '97 coupe with a different tire. The tire pressure max is 50+, I find the best ride is around 42. The TPS is howling about the high pressure. I need to know if there is a way to reset the high pressure threshhold on the brain box.
The pressure on the door sill does not relate to these tires as the sidewall is a totally different profile. At the 32 pressure level the ride is really mushy...
I replaced my run-flats on my '97 coupe with a different tire. The tire pressure max is 50+, I find the best ride is around 42. The TPS is howling about the high pressure. I need to know if there is a way to reset the high pressure threshhold on the brain box.
The pressure on the door sill does not relate to these tires as the sidewall is a totally different profile. At the 32 pressure level the ride is really mushy...
Racer
Joined: Feb 2004
Posts: 359
Likes: 7
From: St. Paul MN
Compared to the runflats with rigid sidewalls, non-runflats will feel softer in the corners. I'd think your Vette would ride like an unloaded F350 with the pressure that high, "enjoying" every crack in the highway.
The high, low, and flat alerts are generated by the RFA unit after receiving the pressure values from the TPMS. The TPMS simply transmit pressure, caring less if it is 0 or 100 psi. The RFA has no configurable pressure options, and those threshholds are likely burned into firmware.
The TPMS can be disabled entirely (only via Tech-II) in the RFA, leaving just key fob functionality. If you still like to keep TPMS and wish to run overinflated, the errors must just be acknowledged and ignored.
Todd
The high, low, and flat alerts are generated by the RFA unit after receiving the pressure values from the TPMS. The TPMS simply transmit pressure, caring less if it is 0 or 100 psi. The RFA has no configurable pressure options, and those threshholds are likely burned into firmware.
The TPMS can be disabled entirely (only via Tech-II) in the RFA, leaving just key fob functionality. If you still like to keep TPMS and wish to run overinflated, the errors must just be acknowledged and ignored.
Todd
Le Mans Master
Joined: Jun 2006
Posts: 6,979
Likes: 31
From: Wichita KS
The TPMS system can be disabled ONLY on the 01-04 vettes (Gen II sensors), NOT the 97-00 vettes (gen I sensors)
Heel & Toe
Joined: Sep 2010
Posts: 19
Likes: 0
OK will need to lower the pressure to get the alarm satisfied. BTW it is true that the manufacture decides what pressure the tires should run at (hard to believe but that seems to be the case). I would have imagined that the tire manufacture would be the one to spec what pressure should be used but in their products... Live and learn...
Any I think I can get away with running 38 lbs and be fine on both sides...
Any I think I can get away with running 38 lbs and be fine on both sides...
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Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,396
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
With tires as WIDE as they are on our C5's the 30 PSI COLD recommended pressure is what works best
Inflate your tires to that MAX pressure. Put some shoe polish ACROSS the tread of the tires in one fat stripe. Then drive STRAIGHT down the road and see if the very center of the tire rubs off quickly and the sides dont. Thats how your tires will wear at that pressure.
Ive had NUMEROUS different tires (runflats and NON Runflats) on my 98, 02 Z 06 coupe and 11 Grand Sport and they ALL work best at 30 PSI cold. 30 psi is the Best tire wear and performance and it will NOT feel like you have 2X4's for shocks!
I have CCW 505As with TOYO Proxies T1R tires. There 315 in the rears and 295 in the front I run 28 cold in the rears and 30 in the fronts for the BEST wear and performance...
BC
Inflate your tires to that MAX pressure. Put some shoe polish ACROSS the tread of the tires in one fat stripe. Then drive STRAIGHT down the road and see if the very center of the tire rubs off quickly and the sides dont. Thats how your tires will wear at that pressure.
Ive had NUMEROUS different tires (runflats and NON Runflats) on my 98, 02 Z 06 coupe and 11 Grand Sport and they ALL work best at 30 PSI cold. 30 psi is the Best tire wear and performance and it will NOT feel like you have 2X4's for shocks!
I have CCW 505As with TOYO Proxies T1R tires. There 315 in the rears and 295 in the front I run 28 cold in the rears and 30 in the fronts for the BEST wear and performance...
BC
Cruising
Joined: Aug 2011
Posts: 11
Likes: 0
From: Georgia
OK will need to lower the pressure to get the alarm satisfied. BTW it is true that the manufacture decides what pressure the tires should run at (hard to believe but that seems to be the case). I would have imagined that the tire manufacture would be the one to spec what pressure should be used but in their products... Live and learn...
Any I think I can get away with running 38 lbs and be fine on both sides...
Any I think I can get away with running 38 lbs and be fine on both sides...
I have Toyo Proxies on 18" wheels all around...some days the sensors say...'right rear tire flat'...but after a few minutes of running they all come to settle at normal of 32-33 psi...
It is normal to see 2-3 psi of increase within a few minutes of run time...
I'm just saying...
JBR
Last edited by W4JBR; Sep 1, 2011 at 11:10 PM.
