The check engine light is flashing during acceleration shakes and the A/C not working properly
most likely a misfie under load have tech at a repair shop to check or a do it yourself
You can go to Advance or Auto Zone and they well extract the codes that are set. Codes will direct you to the source of the problem. Let us know what you find out and we'll be glad to help fom there. Good Luck!
Also look into the oil pressure sensor. My uncle has my old 2001 SES and had to replace it recently.
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