I have a 2002 Chevrolet Impala with the ABS/traction control warning lamp on problem. This problem can be intermittent. The car has approximately 98,764 miles on it. The problem was first noticed at about 89,000 miles. There is an assorted amount of symptoms that go along with this issue. This problem is dangerous and could possibly result in an accident. Here are the symptoms you may experience you may have one or more of the following symptoms: 1. after start up (without the brake pedal depressed) the ABS/traction lamp may or may not come on. This is temperature dependent cold start or hot restart (it seems to occur more frequently at the both extremes). 2. the ABS brakes may cycle on just during normal braking. This may cause the vehicle to unexpectedly pull to the right. 3. the ABS brakes may cycle on while making a slow right hand turn with the brakes applied lightly. 4. the ABS brakes may cycle on when traveling on a straight roadway at about 40 mph and then coming to a slow stop with the brake pedal lightly applied. 5. the ABS/traction control lamp may come on while traveling in light and heavy rain. This may also occur after running the car though an automatic car wash. It should be noted that you may hear the ABS pump motor cycle a number of times (usually 3) before the indicator lamps come on. Technical information: The following failure codes may be stored in the ebcm see below: C1216 electronic brake control module commanded pressure release is to long. C1221 lf wheel speed sensor input signal is 0. C1222 rf wheel speed sensor input signal is 0. C1223 lr wheel speed sensor input signal is 0. C1224 right rear wheel speed sensor input signal = 0. C1225 left front excessive wheel speed sensor variation. C1226 right front excessive wheel speed sensor variation. C1232 left front wheel speed sensor circuit is open or shorted. C1233 right front wheel speed sensor circuit is open or shorted.

- Kenton, OH, USA