28-TCS code C1225H

[BTDOG]

I recently started getting an Active Handling/ABS Warning Light. I pulled the codes and found a C1225H code. This indicates RF Excessive Wheel Speed Variation. Can anyone tell me exactly what this means and is it something I can check or do I need to take it in to the dealership. I just recently replaced the rotors,calipers and pads. Could this have anything to do with it?

Regards,

Mike

 

[Chrisr]

Hi BTDOG,
I'm not sure the code has anything to do with the work you performed. Reason being is that the "H" at the end of the code means "history'. Which means this happened before and is stored in the computer.

Go here: http://www.corvetteactioncenter.com/forums/showthread.php?t=72535

and read Patricks post on pulling the codes. At the bottom of his post is a link to a site that translates the codes. I found this extrmely helpful when I had my tires changes and the car threw about 10 codes!!!

Chris

 

[BTDOG]

Thanks for the response Chris. The code tranlates to (RF Excessive Wheel Speed Variation) whatever that means.

Mike

 

[DRTH VTR]

Thanks for the response Chris. The code tranlates to (RF Excessive Wheel Speed Variation) whatever that means.

Mike

Hang in there for a while. c4c5 specialist will likely see this. Or you could try sending him a PM.

 

[c4c5specialist]

HI there,
I would recommend that you replace your wheel speed sensor harnesses in the front, even though only ONE wheel has set.
These flex over time and create erratic signals from the sensors to the EBTCM.
Readily available and if you can jack up your car, you can replace them yourself.
Allthebest, c4c5

 

[BTDOG]

Will do. Thanks for your help.

Regards,

Mike

 

[silver98]

Before you replace the harness, check to ensure the connection is good. You may have bumped it while working with the calipers. Also, check the ground connectors, then, if you still have the issue, follow C4C5Specialists' advice.

 

[BTDOG]

Well after two months I finally got around to replacing the wheel speed sensor harnesses. Took it for a test drive and within a few miles the Active Handling/ABS Warning Lights returned. What is so weird is that when I reset both of these and turn the car off they may not come back on for another hundred miles or so.Very intermitant. c4c5specialist any Ideas? Or anyone else.

Regards,

Mike

 

[c4c5specialist]

Hi there,
What code?? the same one??
Allthebest, :bang

 

[BTDOG]

Yes, same one.

Regards,

Mike

 

[c4c5specialist]

do you have stainless steel brake lines????

 

[BTDOG]

They are the original lines.

Regards,

Mike

 

[c4c5specialist]

Hm, well, unfortunately, you can do one of 2 things from here.
Replace the right front wheel speed hub/sensor.
Or you can have your local dealership monitor the signals with a Tech 2 and see what exactly is going on.
Alltehbest,

 

[BTDOG]

Thanks, I'll have it checked out.

Regards,

Mike

 

[fdxpilot]

Take a close look at the connectors on your ABS speed sensors. Another forum had a thread showing pictures of connectors where the pins in the plug were loose and causing this condition. The pins were noticably out of place, compared to another connector and caused an intermittent condition.

 

[BTDOG]

I'll check it out. Thanks

 

[TODD L GRIFFITH]

Here is a common problem with all C5's. I would check the two ground plugs behind the headlights located on the frame rail. These tend to corrode inside and throw out ABS and or, traction control codes out of the blue. The corrosion is the green/blue color.
These are the grounds for the PCM and BCM. G101 & G102. Moisture penetrates the plugs. All they need is a good cleaning with a wire brush. Check them on a regular basis.
Symptom: Cruising along at a steady speed then dash lights up like a christmas tree, and ABS or traction control message in the DIC. You may get a service vehicle soon message also.

 

[BTDOG]

Thanks Todd I will check it out this weekend. I really hope that's my problem.

Regards,

Mike

 

[TODD L GRIFFITH]

Thanks Todd I will check it out this weekend. I really hope that's my problem.

Regards,

Mike

Bill Curlee who is the electrical guru at corvette forum brought this whole grounding issue to light. He said GM is aware of this problem with the grounds. Sometimes the chances of some remote sensor failing all of a sudden is "remote" hehe. Let me see if I can find a link for you to view pics. of the grounding plugs. http://forums.corvetteforum.com/showthread.php?t=896875&highlight=G102
Scroll down and view the pics. of the plugs.

 

[BTDOG]

Thanks that is a great link. I can't wait to check mine out this weekend. I will post what I find.

Regards,

Mike