Are you aware that the majority of ABS problems are from loose wheel bearings? When diagnosing an ABS failure warning and you have a sensor failure code, first check for loose wheel bearings before replacing the sensor. In most of these cases ABS failure warnings arise after brake shoe replacement and during reinstallation of the drum. Either the sensor gets bumped, pushing it out too far from the tone ring, or the bearings are not tightened to specifications. Loose bearings allow the wheel to move just enough to push the sensor out of range of the tone ring.
To avoid this and also premature bearing failure, always follow the proper procedures found in your MCI maintenance manual. Also include the following steps:
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