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abs and traction controls both use the same wheel sensors
before you do any very costly repairs check that all the sensor wires are connected
if you run the fault codes you may even get which wheel sensor has failed
Several autoparts stores like Autozone, Oreilys and Advance will scan your vehicle for free and tell you what Codes are present. The scanners are different, so the store would need a scanner that has the ability to diagnose the traction control system with the ABS.
The Traction control works with the ABS to limit wheel slip. Intermittent flashing of the Traction light can occur, sometimes the brake pads are worn and do not respond as well as they should. The system counts the RPM of each wheel, applies braking and can interrupt power of the engine.
ABS = Anti-lock Brake System. TC = Traction Control System (Engine Control Module). If the ABS lights on the dashboard permanently the ABS system is faulty. You must access the ABS & TC Electronic Control Units (ECU) memory for pull out all DTC (Diagnostic Trouble Codes), using diagnostic equipment connected to the data link connector of the car. Then you will be full informed about bad pieces (e.g.: front right wheel abs sensor interrupted, ...). After bad pieces replacement you will be able to erase all faults memored by ABS ECU, in other words reset the ABS system and turn off the warning lamp on dashboard. I suspect bad brake pedal switch, but you should scan the ABS & TC ECU's.
If this car is older it is most likely a wheel sensor. GM put abs sensors on all four wheels built into the wheel bearings. If one of these sensors goes bad, your abs light, as well as traction control ( if equipped) will shut off and show low traction. Unfortunately, to figure out which one is bad, you need to have your car put on a chassis computer
where do you hear
moaning sound coming from ? Under the hood in engine bay ? That could be the ABS pump motor ! maybe going bad . service traction control light on ? DTC'S - diagnostic trouble code or codes stored . Have codes checked .
An ABS sensor DOES affect the traction control system. Traction control uses these sensors to determine if a wheel is losing traction. A bad sensor will cause both the ABS and TRACTION lights to come on.
The CHECK ENGINE light however is going to be a seperate problem.