Oil Pressure Not wanting to step on you, the issue with the Sequoia is really fixed by replacing the printed circuit board behind the inst cluster, thusly replacing the combination meter ECU. If you want, please comment back to the Client, he needs P/N 83291-0C012-RP if he desires a permanent repair... BTW...The "Experts not seeing comments is being looked into". I had two problems -- erradic oil pressure gage and low pressure at idle. I replaced the sender which fixed the erradic problem. Now oil pressure tracks with rpm and temp. Higher RPM - higher pressure; and higher pressure when engine is cold -- lower when warm. My issue now is that at idle and especially in drive, if the engine rpm is at ~800, the oil pressure indicater is at 1/4. If the engine rpm drops to ~700, the oil pressure gage begins a slow creep down to the bottom of the range and even a little below "L". Sometimes it will creep back up on its own or if I pull it out of drive into neutral, it will come back up. My question is, I really dont want to spend the $350+ on the ECU to fix this -- am I at risk of damaging the engine?

First test the engine oil pressure by removing the sending
unit and temporarily installing a mechanical oil gauge. Run the engine and
note pressure at normal engine temperature; at idle 15 to 20 pounds is okay.
Raise the engine speed to approximately 2000 rpm. The pressure should be 40
to 50 pounds. If the readings you get are lower, you may have a oil pump that
needs replacing.

First test the engine oil pressure by removing the sending unit and temporarily installing a mechanical oil gauge. Run the engine and note pressure at normal engine temperature; at idle 15 to 20 pounds is okay. Raise the engine speed to approximately 2000 rpm. The pressure should be 40 to 50 pounds. If the readings you get are lower, you may have a oil pump that needs replacing.

To check for these conditions a manual oil pressure gauge
is needed. Locate
the oil pressure port near the engine oil filter. Remove the sender or switch
and install the oil pressure gauge. Start the engine and observe the gauge.

To check for these conditions a manual oil pressure gauge is needed. Locate the oil pressure port near the engine oil filter. Remove the sender or switch and install the oil pressure gauge. Start the engine and observe the gauge.