If you pay for OnStar you can push the blue button and they can pull codes and tell you if it's safe to drive home or if you should park it and have it towed. If you don't pay for it, it might be worth while to sign up for a month..

 

Man... I do have OnStar, I totally forgot about that... Thanks

 

Most auto parts stores will pull the code(s), get them and post them here.

And from the manual, this isn't an "immediately critical" warning like a flashing CEL or low oil pressure message BUT NOTE the part where the power/performance may be further reduced after the next restart:

"ENGINE POWER IS REDUCED
This message displays when the
vehicle's engine power is reduced.
Reduced engine power can affect
the vehicle's ability to accelerate.
If this message is on, but there is no
reduction in performance, proceed
to your destination. The
performance may be reduced the
next time the vehicle is driven. The
vehicle may be driven at a reduced
speed while this message is on, but
maximum acceleration and speed
may be reduced. Anytime this
message stays on, the vehicle
should be taken to your dealer for
service as soon as possible. "

Rodger

 

Most auto parts stores will pull the code(s), get them and post them here.

And from the manual, this isn't an "immediately critical" warning like a flashing CEL or low oil pressure message BUT NOTE the part where the power/performance may be further reduced after the next restart:

"ENGINE POWER IS REDUCED
This message displays when the
vehicle's engine power is reduced.
Reduced engine power can affect
the vehicle's ability to accelerate.
If this message is on, but there is no
reduction in performance, proceed
to your destination. The
performance may be reduced the
next time the vehicle is driven. The
vehicle may be driven at a reduced
speed while this message is on, but
maximum acceleration and speed
may be reduced. Anytime this
message stays on, the vehicle
should be taken to your dealer for
service as soon as possible. "

Rodger

Thank you. I really didn't feel a performance difference, but voluntarily limped home. Calling OnStar now

 

UPDATE - went to autozone and pulled the code, pulled a code P06DE, they say likely the oil pump. The CEL has since turned off now.

 

If you had the oil and filter changed before your trip, perhaps incorrect one used. With 187k worth of bearing wear, oil that is too thin might cause pressure to drop in a hot area. I know M1 5w-30 years ago was almost in the 20 weight range, don't know about now.

If not that, I'd go for the oil pressure sensor before I'd jump to the oil pump like the Autozone guys. Sensor can probably be DIY, oil pump would be a bear. Also found this:

Low Oil Pressure Condition on 2.0L and 2.5L 4-Cylinder Engines – TechLink

gm-techlink.com

 

P06DE by itself for most engines indicates oil pressure is higher than commanded which is usually due to a faulty pressure sensor. But there is a curious Techlink article which indicates for these engines it could also have an associated low pressure code associated with it: Low Oil Pressure Condition on 2.0L and 2.5L 4-Cylinder Engines – TechLink

There is another bulletin associated with a piston oil squirter breaking or coming loose so clearly this code is also being used by GM to indicate pressure either low or high beyond commanded/expected value. Another reason vehicles ought to have an oil pressure gauge, my ATS is the only car I have owned not so equipped: https://static.nhtsa.gov/odi/tsbs/2014/SB-10070545-0335.pdf

As Angel71rs stated, go for the sensor first and if not the oil pump is more involved since this is a variable displacement pump.

Rodger