I first had issues with the active handling comming on out of nowhere and braking the right passanger side wheel. This started not long after a racoon ran out and I caught him with my rear right tire. Last night when I was leaving funfest I got the check engine light telling me to service the active handling system. I stopped up the rode and restarted the car and it still came up. I turned off AH/TC and made it home fine but the AH light stayed on. Today I went out and checked for codes. The only two related to the issue were C1287 and C1288 for the steering position sensor (could this be caused when
I dropped the column to put in guage bezels?) and U1064 for lost communication. They were in the history and not current.

Someone mentioned to me that the problem could be the AH connecton to the wheel hub being dirty and the source of the problem. With the above codes though I am not sure. Does anyone have any ideas regarding this. Your help will be much appreciated. Thanks.

 

I have the same problem with AH coming on at unexpected moments, and at times even asking me to service the system. Please, if anyone out there has ideas, I too would like to know what is wrong.

 

I have the same problem just after start-up when i'm backing out of a tight spot. It doesn't happen very often and it always goes off when I shut the car off, but it's really annoying. Good luck finding an answer, I'll be interested to hear the outcome.

 

Those 2 codes do affect the AH/TCS system and will light up the TCS icon on the dash and display SERVICE ACTIVE HANDLING and SERVICE VEHICLE SOON messages on the DIC. The steering position sensor is used by the EBCM for calibration of the AH and TCS system after every restart.

It could be either the Steering Wheel Position Sensor, the EBCM module or the wiring in between. First thing to check is the steering wheel sensor connector - it should be at the base of the steering column where it meets the floorboard just above the brake pedal. The connector will be at the 9 o'clock position around the steering column.

Unplug the connector and check the wiring for any problems, then reseat it. Hopefully that will address it. The issue could be the sensor itself. Otherwise the issue could be the EBCM which is not cheap, but I would expect more than just those codes if the EBCM was failing.

It does take 50 restart cycles to clear the codes so you should manually clear them and see if the problem returns again.

 

You have a ground problem at G101 and G102. Here is a link to solve your issue.
http://forums.corvetteforum.com/show...highlight=G102

 

Excellent info, thanks guys. I'll check both the connector and the grounds, hopefully it's one or the other.

 

Thanks to Bill Curlee a member here. Here is some info I put together from another post. You tell me if this is what has been happening.

There are two grounds at each frame rail within the engine bay, but the front may be the ones you want to check first. (G101 and 102) The grounds are located at the front of the engine bay on top of the frame rail, below the hood strut, in back of the headlights. Each ground on each side has a plug associated with it. These plugs get corroded inside and cause havoc with the sensors. You may get a "service vehicle soon" message along with a P1637 code. You may get some "service ABS system", or "service traction control system" messeges. Charge system fault is another that may pop up on the DIC.

Symptoms: During cruise without warning, dash lights up like a christmas tree, "service vehicle soon" appears in the DIC. You may also get a "reduced engine power" messege and have to pull over.

Treatment: Remove the plugs and all ground wires from the grounding studs. Use a wire brush and clean all connections and the stud at the frame rail. Remove the plugs (removed from the bottom of the plug) and clean male connectors with a wire brush. The female side is harder to clean, but a very small file can do a good job. Restore the plugs and reinstall the grounds. While you are there, the other two grounds (G103 and G104) are located along the inner side of the battery box (3 ground wires) and the other, (single wire cable from the block) is located directly below the power break booster along the frame rail opposite hand of the other at the battery box. I would remove those as well, and clean all the connections for good measure. If 101 and 102 are corroded, then others may be also.

After this is complete, and the grounds restored, remove fuse #52 at the fuse center in the engine bay next to the battery and inspect it. If all looks fine reinstall.

The chances of all those sytems failing at once, throwing all those codes is next to impossible. It is PCM or BCM related, or the ability for the PCM or BCM to communicate with all those sensors. If those two modules are not grounded properly, or intermittent, they can cause wide spread sensor failures at once. Sounds familiar?

I had this problem recently. I cleaned all the plug connections and grounds described, and the messeges have never appeared again.
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For me, my random C1287 and C1288 codes were a loose steering sensor plug at the base of the steering column (inside, where it goes through the firewall). I 'clicked' the plug in, and haven't had a problem since.

Worth a peek.

 

I had the same issue. Replaced the steering input sensor and all is well.

 

I checked the ground on the driver's side behind the headlight. One side of the plug was not pushed in all the way. I set it back in and went for a drive and had no codes pop up. Looks like that took care of the problem. Just wanted to say thanks again to you guys for helping me trouble shoot this.

 

I don't know why all these plugs are popping out. I had the same problem, but with the steering connector.

 

Glad you found the problem. If you get a chance, clean them, and check them on a regular basis every three months or so as part of your regular maintenence. This is what I've done, because I had issues with mine as well. Even if they are plugged in, moisture penetrates the plug and corrodes the male and female terminals.