Chart A14 "Pressure Reduction" Fault: Notes
WARNING: This page is about a different car, the 1988 Buick Riviera and 1988 Buick Reatta. However, it is still accessible from the selected car via links, so may be relevant.
- Codes will set when EBCM commands a pressure reduction to a wheel hydraulic circuit for a period of time, but circuit did not respond as EBCM expected to. This could be caused by wheel speeding up when EBCM signaled a reduction of pressure to that wheel.
- Possible causes are: erroneous wheel sensor signals, improper valve activation, defective wheel brake or long term exposure to strong electromagnetic interference.
NOTE:
Codes 51-54 and 71-74 indicate a condition which may be attributable to either the wheel speed sensor circuit or the outlet valve