The OVP can be very hard to 'check'. It may appear to be fine functionally, and being a simple device - basically a relay - it would be easy to give it a clean bill of health and move on to the next suspect.

Problem is, this device tends to develop poor connections, either at solder posts on its circuit board, or at the relay contacts themselves. When that happens, voltage at its output fluctuates to the ECU, ABS, and elsewhere, causing erratic opertion of those modules. I had this happen even with a brand-new one I installed. Keep your suspicions about this device. Might be worth replacing as a matter of course if nothing else surfaces.

Steve

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