Let me start by saying that I tried a search on this topic and nothing came up.

I started my car today and I backed out of my garage and I got two messages that I also got about 4 days earlier. It was telling me to service my ABS and my traction control system. They both lit up at the same time and once I reset them they go away. The first time it happened I turned the car off, started it back up, and drove around for a little bit and it never came back on. Today I reset it and drove to and from work without issue. Has anyone else had this problem or if not, does anyone have any suggestions as to what the problem might be. I am pretty handy in the garage so I like to do the work myself, but I don't know where to begin looking for the problem. Thanks in advance!

--Marc

 

anyone??? anyone???

--Marc

 

Sounds like an intermittent wheel speed sensor. But, like always, check and see what codes you have. Make sure you make note what suffix letters are behind the numbers. i.e. C1227 H or C1227 HC.

Here is how to check your codes:


http://www.stengel.net/diccodes.htm

 

I had a similiar problem. Service TC/ABS/AH. Ended up being the EBCM and BMPV. Covered under warranty luckly and was nearly $3k in repairs. Good luck.

 

Do you have Euro tails?

 

I agree with the wheel speed sensor. I received the same codes (if that's what you're getting), with the same ABS/TCS message. I put some dilectic grease on the wheel sensor harnesses and the codes went away. These harnesses get a lot of dirt since they're so exposed.

 

This happened to me one time last year. After reset, never occurred again!

 

Just by chance....

If you start the car and back it up in a spirited way that includes turning the wheels sharply (while in reverse), you will spoof the computer into activating AH. This is because the calculations assume a forward start direction, but you actually give it a reverse start direction. The calculation busts the acceptable parameters and AH is invoked and that can set a code because the computed directionality values were askew.

Just a thought. Has happened to me when I toss the car around in reverse on start up.

Now, if you were just slowly backing up granny-style, kept the wheels straight, and still set a code...then like the others....I tend toward a bad sensor.

Ranger

 

Where is that harness located?

--Marc

 

I think that is my problem because it only happens when i am making a sharp turn into and out of my garage. I am going to try greasing up that harness just to make sure too. Thanks for all your help guys!!

--Marc

 

no I don't. Why would that cause the codes??

--Marc

 

Mine has done it on occasion, I blamed on damp weather conditions, but it always happened on backing out of my carport onto the street a distance of four feet, so of course I am making a sharp turn. Never caused any real problems but interesting none the less.

 

What you need to do is see what the underlying codes are as I mentioned in the above post. It's easy. Why keep asking people to guess at it?

All you need to know to analyze the problem is explaned at:
http://www.stengel.net/diccodes.htm

 

Did you put the grease inside the plug or "on the connector"?

Thanks!

 

Marc,

All of the following is from the Service Manual.

The ACT/HNDLG-WARMING UP message is set either because the underhood temperature is too cold or the Steering Wheel Position Sensor has not been centered after 30 seconds. There is no indication how cold is too cold!

The Electronic Brake And Traction Control Module (EBTCM) acquires information from wheel speed sensors to see if any wheel is slipping and also monitors the Stoplight switch to see if the brakes are being applied (in which case Traction Control can be disabled if necessary).

It monitors the Steering Wheel Position Sensor and determines when the car is being driven in a straight line and how far the wheel is being turned. The computer waits until the car is going 18 MPH and then monitors the SWPS for steady state for 30 seconds. It then assumes that the vehicle is going straight and accepts that output from the sensor as "steering wheel centered position". This is done to compensate for wear over time. It monitors the Lateral Accelerometer to determine the lateral acceleration of the car. These two measurements are used to calculate the desired yaw rate. The LA also provides input for Bank Angle Compensation so that the system does not over compensate in banked turns.

It acquires Yaw Rate from the Yaw Rate Sensor and calculates Yaw Rate Error and will modulate brake fluid pressure to individual wheels to restore proper yaw rate error. If a system malfunction is detected it can disable the Anti-Lock, Traction Control and Active Handling Systems and will turn on the AntiLock and/or CAR Icon on the dash.

~Bruce

 

My car has started throwing the same "Traction Control" and "ABS" warnings. I don't have AH. Also, it throws the codes when I turn the key but before I crank the engine. I can turn it back off and try it again with the codes usually vanishing. I have tried my ABS when the code was thrown, and the car did lock up the tires.
What a nuissance.
Does anyone have a picture of the speed sensor wires? With my luck I'll disconnect my brake lines instead!

 

I kept getting 2 codes one was (C1277 Requested Torque Signal CKT Malfunction) and the other was closely related.

I went to several Chevy dealers who were mystified and finally paid one Chevy dealer $400 to tell me that it was a problem with my tune. Yeah......right. Like what does a tune have to do with the PCM not receiving the torque signal from the source?

Then I found out I had a faulty BCM and am chasing GM for my $1500 for parts/labor. Car runs just fine now.
Scott

 

I had the same problem about a week ago. The ABS and Traction Control lights would be on sometimes and sometimes they wouldnt. When the lights were on my brakes would lock up. I took it to the dealership to get it fixed and it was the ABS Pump two parts one was about 1700 and the other 500. My Vette has about 35000 miles on it, but it is a 2000 so I dont have a warranty on it. My dealer called GM and GM is taking care of it. I hope you dont have the same problem I did but if you do have the dealership call GM and see if they will take care of it.

thanks GM!