Update: I replaced the battery and the CEL disappeared ... till the next day. Went to friends Indy P-Car shop, connected their Durametric PC to the car and cleared the Fault codes. I guess one needs to clear out the codes in memory. The CEL has not come back on since the reset which is almost a month. The car does run better and smoother with this battery installed.
It seems that 94R is the correct battery for Tip equipt cars; recommend others to upgrade to the 94R if they are having issues. Listed as "Optional" when looking through battery lookup books. Hope this helps.
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2002 Boxster S Seal Grey
2010 Ford F150 FX4 Luxury
Retired after 38 years with the same company.
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