I’ve been trying to diagnose what wrong with my traction control system but can’t find the answers I need...
Start up the car and the tc/esc come on and stays on. If i’m Driving and put it in neutral and turn off the ignition and restart it the tc/esc lights don’t pop on until I come to as stop. Now if I stop the HHR with the E brake using the above method the tc/esc will not come on, however if I depress the brake pedal the tc/esc Light come on.
Does anyone have an idea what could be malfunctioning? All the harnesses are tight and the wires look good, I also checked the brake fluid that’s fine too.

 

It sounds like a hub problem, but to determine which one you need to use a OBDII code reader that will read more than just the basic engine codes. Did you check the wiring for the system at each hub - could be a broken wire or bad connection.

 

I checked all the wires and connections. I’m not so sure it’s the hub sensors. I can stop perfectly fine time after time with the E brake and even sit in park, but if I depressed the brake pedal while stoped the tc/esc lights pop on. Frustrating as hell. Also I changed both hub bearings over the summer.

 

You haven't said if the CEL is on, or if you've had a code reader on it. It could be a vacuum problem, seems like everytime it comes on is when you step on the brake pedal.

 

then you will need to use an advanced OBDII code reader that will read more than just the basic engine codes.

What about the remaining hubs?

 

No cel, the odd thing is that it’s only when i’m At a complete stop. Braking doesn’t trigger it while driving. Only if I come to a full stop with the brake pedal.

 

Whopper, no I haven’t replace the rear hubs, nor have I checked for codes.

 

Brake fluid? Brake pads/shoes?

 

Donbrew, all those are in good working order and brake fluid is good too.

 

I know this sounds crazy, but check the air pressure in all your tires. This happened to me last night SERVICE ESC on the DIC. Sure enough, I had a really low tire. Inflated tire and light has not come on since.