[ImperialCrown]

Welcome to Allpar. Solve for P0118- ECT voltage too high. This can be a poor or open ground in the connectors, wiring or PCM. Inspect all. It can affect more than the tmperature value reading.
I found oxidized sensor terminals on my wife's 2001 3.3L Caravan. Cleaning them eliminated P0118.
I had to remove the P/S fluid reservior and ign coil to get at the sensor.

P0118-ECT SENSOR VOLTAGE TOO HIGH

When Monitored: With the ignition on. Battery voltage greater than 10 volts.

Set Condition: The Engine Coolant Temperature (ECT) sensor circuit voltage at the PCM
is greater than 4.96 volts for more than 2.6 seconds.

POSSIBLE CAUSES:

INTERMITTENT CONDITION
ECT SENSOR SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE
ECT SENSOR INTERNAL FAILURE
ECT SENSOR SIGNAL CIRCUIT OPEN
SENSOR GROUND CIRCUIT OPEN
PCM

 

[world313]

When the ect sensor goes out how does it make you van run

 

[valiant67]

I've had them fail two ways.
First one failed and the fans never came on and the van overheated.
Second one failed and the van was hard to start cold and hesitated and sputtered until it warmed up.
Both these happened on the 3.3 in my 1991 Grand Voyager.