What causes low power engine over temp light on check engine lite on?

93 Mercury Grand Marquis Wiring Diagram

What causes low power engine over temp light on check engine lite on? 1995 mercury grand marquis engine diagram

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1995 Mercury Grand Marquis Engine Diagram - Automobile Components Parts

1995 Mercury Grand Marquis Engine Diagram - Automobile Components Parts
1995 Mercury Grand Marquis Engine Diagram - Automobile Components Parts

What causes low power engine over temp light on check engine lite on?
What causes low power engine over temp light on check engine lite on?