Trouble Code: P2181
Cooling System Performance Malfunction
Possible Causes:
ECT sensor has failed
ECT Sensor (on Radiator) has failed
ECT sensor signal circuit is open (inspect wiring & connector)
ECT sensor signal circuit is shorted
Cooling system malfunction, or the thermostat is stuck
Engine not operating at normal operating temperature
EOT sensor is damaged or it has failed
Check to make sure you have the green CTS (coolant temp switch). alot of cars had a faulty black ones. even the green ones are know to go bad. usually get horrible gas mileage and stuff like that!
This is the code for cooling system performance. Possible causes could be the wrong mixture of coolant, water pump going out, low coolant level or pressure cap is bad.
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