O/d light blinking

The light blinking is to get your attention , DTC'S diagnostic trouble codes stored to point Tech. to problem .

A flashing check engine means you have a catalytic converter damaging misfire ! Do you notice a jerking or bucking under a part load , going up a hill ? Check Engine Light Flashing Misfire Diagnosis by Autolite Spark Plugs

Well if overdrive light flashes on fords means a pretty bad problem with transmission

the OD lamp on most cars blink when there are errors.
what everyone does is plug in the scan tool and see the DTC codes.
my guess your finger trick fools the TCM .
for a while, and means nothing.
TCM are easy to fool ,its just a tiny microcomputer.
TCM is tranny shift brain.
why not connect the OBD2 scan tool to the DLC and see the Px7xxx codes spit out and then look them up in the FSM for how to diagnose them.
or get it fixed

Good morning! I would suspect a defective light control sensor...see images below...Cost is approx. $150.00




Guru...saailer

I’m happy to help further over the phone at https://www.6ya.com/expert/david_6df67de3b14de867

Any poor performance of the transmission with indicator lights on the dash mean you have problems that need to be resolved immediately...

There is some problem with your automatic transmission. Hook up OBD scanner to determine the error code and proceed to rectify the problem.

4 cylinders have a hall effect switch. They go bad slowly and sounds like your problem

why does the d4 light start to blink and it doesnt stop even if you put it in park?