Try This
My OEM Factory Repair Manual says the EIC on the Continental has its own diagnosis ability.
If your cluster is the same design:
CCA Guage Select, to the left, Odometer center, and MCCA to the right.
Diagnosis and Testing for warning message on EIC
Get note pad to take down the codes.
KOEO
1. KOEO - turn key to "on" position and press MCCA System Check. After it runs, note if the Check Charge or Check Engine lights remain on. Turn off key off to cancel and clear. KOER test. Repeat steps in KOEO except start engine.
2. KOEO EIC Code Test - With the key off, press all CCA simultaneously then turn key to on position, let go of CCA. If any numbers are flashing in CCA, replace cluster. There may be flashing in MCCA and its normal. Write the numbers in: CCA, Odometer, MCCA. In the odometer section you may see something such as "02" and "dealer 4."
Then press once, CCA " Guage Select." You'll get new or different information. After you have written the information on your pad, press the Gauge Select again. Write information on your pad. Press Gauge Select a third time, write information. To exit test mode press CCA Speed Alarm. Turn key off, which also clears the data.
Taking your codes to determine symptoms probably is the next challenge. On my model the "check engine" if you are getting a warning tone and blinking "check engine" it means a serious issue. But that could be the EEC needs replacing or your 02 sensor needs replacing.
But the above test will give you a more accurate and narrowed area to look for the problem, such as the harness or EEC may be bad.