2013 RAM 1500 ABS and Traction Light - C102B Code

Question

The ABS and traction control lights just popped up on my dash after hitting a small pothole last week. I plugged in my scanner and it's pulling a C102B code for the right rear wheel speed sensor. The speedometer seems to be working fine, but the cruise control won't engage anymore.

Chris Donovan · Accepted Answer

The issue ended up being a combination of a hairline crack in the sensor housing and a corroded tone ring. I replaced the Right Rear Wheel Speed Sensor with a Mopar OEM part (68003281AC) and used some brake cleaner to get the gunk off the tone ring surface. The sensor bolt requires very little torque, just snug it to about 70-80 inch-pounds. After a short drive, the lights cleared themselves and the cruise control is back to normal. Part cost was about $45.

Jake Morrison · Answer

Make sure to inspect the tone ring inside the hub. If debris or metal shavings get stuck on the magnetic ring, it will cause a comparative performance code because the signal gets distorted at higher speeds.

Pete Sanders · Answer

You should check the live data on your scan tool while driving. If the right rear wheel speed is significantly different from the others, it confirms the sensor or the tone ring is the issue rather than a module fault.

obd2_owl · Answer

On these RAMs, the wiring harness often rubs through near the rear axle housing. Check the loom about 6 inches back from the sensor plug; I've found many broken wires inside the insulation that look fine from the outside.

2013 RAM 1500 ABS and Traction Light - C102B Code

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