[Shotimes] 52 & 72 codes

[Paul Nimz]

Last night coming home the check engine light started blinding me.  It would
come on for a minute and then shut of for a couple minutes continuously.  This
happened after the car was good and warmed up and running for about a 1/2
hour.  Codes pulled are 52 and 72, KOEO.  No KOER codes found.

72 doesn't appear to apply to my '93 and 52 is the PS pressure switch.  Anyone
with advice?  The car is running great.

Paul Nimz
'97 TR
'93 EG mtx