Or, you could have several problems. The shift lock override could be a PNP switch failure pending. The ABS module could be failing. And the relay for the turn signals could need replacing. Unless, of course, these things all work occasionally.
The next time you have to use the override, turn off the car and row the gear selector about 20 times from P to L - that tends to clear some dirt from the PNP contacts.
Try the emergency flasher button to see if the relay is working for the turn signals.
The ABS light should turn out after the car starts, if it doesn't, move the key a hair back or forth. If the light goes out and the car is still runing, get a new switch. Listen for the clicks the ABS goes through at about 18mph, if there are no clicks, the module may need replacement.

Klaus
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98 V70Rawd(108Kmi), 95 854T(88K mi), 75 164E(173K mi)