Error code
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Heel & Toe
Joined: Feb 2019
Posts: 16
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Error code
Hello guys I recently had my control module fixed and reset control arms and speed sensors done but I keep getting this code 28-TCS C1233 H C I've googled it but I'm sure the speed controller was fixed too can anybody give me any insight on this and how much roughly it would cost to fix if it wasnt done the first time, and how can I clear my tire pressure warnings I've dropped the tire pressure to 200 like it says but now it's just a warning with no actual pressure numbers on and I can't get to my odometer, thank again for any help.
Last edited by Vettestang1978; May 22, 2019 at 07:27 PM.
Tech Contributor
Joined: Dec 1999
Posts: 32,910
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From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
What year C5 do you own. You should update your profile and or always put the year car in your post. There are differences.
C-1233 is the right wheel speed sensor DTC. Each wheel hub has a sensor that produces an AC voltage. When the wheel rotates the speed of the wheel increases the sensor output voltage increases and so does the frequency. The EBTCM needs to see that voltage or it throws that DTC. You need to figure out why the voltage isn't getting to the EBTCM
Both front wheels have a JUMPER HARNESS that connects the hub pig tail to the cars wiring harness connector. Most of the time that harness can be the issue but, you really should do some troubleshooting instead of throwing lots of parts at it. Do you have a volt meter??
"Ive dropped the pressure to 200" ,, WTF? , 200 what.
Tire pressure should be set to 30 pounds.
If you press the "RESET" button on the right side of the Instrument Panel,, you can clear the messages. You can read the tire pressure of each tire. You really need to read the cars OWNERS MANUAL to figure out how to use the instrument buttons and the Drivers Information Console (DIC). Google (your year C5) corvette owners manual and you will find a FREE PDF copy of the C5 owners manual for your year C5.
Bill
C-1233 is the right wheel speed sensor DTC. Each wheel hub has a sensor that produces an AC voltage. When the wheel rotates the speed of the wheel increases the sensor output voltage increases and so does the frequency. The EBTCM needs to see that voltage or it throws that DTC. You need to figure out why the voltage isn't getting to the EBTCM
Both front wheels have a JUMPER HARNESS that connects the hub pig tail to the cars wiring harness connector. Most of the time that harness can be the issue but, you really should do some troubleshooting instead of throwing lots of parts at it. Do you have a volt meter??
"Ive dropped the pressure to 200" ,, WTF? , 200 what.
Tire pressure should be set to 30 pounds.
If you press the "RESET" button on the right side of the Instrument Panel,, you can clear the messages. You can read the tire pressure of each tire. You really need to read the cars OWNERS MANUAL to figure out how to use the instrument buttons and the Drivers Information Console (DIC). Google (your year C5) corvette owners manual and you will find a FREE PDF copy of the C5 owners manual for your year C5.
Bill
Last edited by Bill Curlee; May 23, 2019 at 11:34 AM.
Moderator, Tech Contributor
Joined: Sep 2013
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From: Cape Coral, Florida
What kind of tires are you running on that thing ??...main landing gear tire pressure on a Boeing 777 are at 200 !!...if the tire is overinflated and I don't know if it is really at 200 but a way overinflated tire can set this DTC !!
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Its a dealer part. Before you get a new part, you can easily disconnect it and test it with an OHM Meter. Its only a two wire connector/cable harness.
The harness has two connectors. One on each end. The FEMALE pins in those connectors and the connector that it plugs into on the top of the frame in the wheel well also has female pins.
Look at the female pins and see if they are deformed. If they are, that could be the issue and all you need to do is re-bent the pin to make better contact with the male pin.
Here is a picture of a bad connector and a brand new connector. Bad connector is on the right side! Note the spread in the female pins in the old one:
The jumper harness removed from car:
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
While it apart you can test the wheel speed sensor. Measure the pig tail male pins with an ohm meter to see if you have continuity. You can set the meter to AC Volts, spin the wheel and you should see voltage that increases with wheel speed.
