First of all inspect the brakes. if the pads and rotors are good yhen the brakes will at least be safer. the fault codes do not apply to the mechanical end of the brakes
C0040 indicates right front wheel sensor, so problem is more than likely sensor or wiring to it. c0245 indicates wheel speed sensor frequency error. This confirms wheel sensor or wiring.
SOURCE: abs light and trac off light on
hey, ihad this problem with abx and trac off light on all the time even after having replaced the wheel bearing twiice. how i fixed it was to replace the wiring harness and poof issue resolved. a technical service bulletin is available for this issue
SOURCE: I have a 2003 Pontiac
Hi,
The trouble codes are for the left front and right front wheel speed sensors. You should open your hood and in front of the engine on the drivers side under the air filter box you will see a silver tube shape object which is the air condition dryer. Look for your main wiring harness that pass near it. The harness can rub on the dryer and cause many different electrical problems including abs problems. If you see the harness rubbing on the dryer you can move the main wiring harness with your hand to see if there are any cut wires. If they are then you will need to repair the wires that are damage and reposition the harness to it will not rub anymore. This is a common problem with the pontiac grand prix.
Good Luck!!
Thanks!!
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