Abs code C0040 is RF sensor circuit. Common GM issue and lots of replies are for actual wire harness and not the sensor in wheel. The short harness from wheel bearing to plug at fender liner is 18”. How about the next harness from liner to control module? How do you track down what harness may be th…

C0040 code

keith June 24, 2019, 5:00pm 4

You may have a wheel bearing (or hub) going bad. The slightest wobble will damage the sensor.

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